Friday, May 19, 2023

Emerald Ash Borer

 

    Emerald Ash Borers (Agrilus planipennis), also referred to as EAB’s, are introduced invasive beetle that is a threat to our native ash trees. The beetles themselves are small and an attractive metallic green color. They are native to Russia, Northern China, Japan, and Korea, where the native ash trees they evolved with have ways of dealing with them so they are not killed which our native ash trees do not.

    They were accidentally introduced into North American in 2002 near Detroit, Michigan as part of cargo shipments. Since then, they have spread into more than 20 states. They reached Fairfax, Virginia in 2003, and were believed to have been eradicated after the region was put into quarantine and all infected trees were destroyed. However, they reappeared back into Fairfax and then Arlington in 2008, having broken quarantine. Since then, they have started wiping out all our native adult ash trees, and some report have started to also infest fringetrees.

    The spread has likely due to the adult beetles being good strong fliers and their propensity to be spread by transporting firewood. This has led to “Don’t Move Firewood” campaigns and using only local firewood in many localities.

    They larva bore into ash trees just under the bark, feeding on the phloem and xylem tissues that feed the tree. They can thus starve the tree or even girdle them so they die off. About 2 years after infestation, the trees start to lose canopy and within 3-4 years the ash trees are dead. 

The D-shaped holes of emerging Emerald Ash Borers.

     The adults complete their life cycle within a year, sometimes two, leaving telltale D-shaped openings as they emerge from the tree. Eventually after woodpeckers have searched for the larvae to feed on and as the bark falls off, you can start to see the damage that the borers due to the tree itself with tunnels all over just underneath the bark. 

The galleries and tunnels of Emerald Ash Borers just below the bark of an ash tree
   

   Some jurisdictions such as Arlington are trying to protect the ash trees by treating the trees by injection to kill off the borers, but this can also affect other native tree feeders. Right now Arlington is treating 19 significant ash trees to protect them and so they can act as the seed source for new ash tree saplings, which until they get to certain diameter, will still provide wildlife value. 

 

     This May, parasitoid wasps which exclusively feed on emerald ash borers will be released as a biocontrol. These wasps are the size of a grain of rice and are completely harmless to humans. They have been tested and will only affect the invasive emerald ash borers and nothing else. These have been released and proving to be a great tool in the management of this invasive, including in Fairfax County last year. 

A hanging wasp vial with pupae inside hanging upside down to protect from rain. The adult wasps are so small, they easily escape through the protective mesh.

 

Wednesday, May 17, 2023

Eastern Bluebirds

A male Eastern Bluebird

    Eastern Bluebirds (Sialia sialis) are one of three species of bluebirds in North America. This includes its close relative the Western Bluebirds (Sialia mexicana) out west (which they can hybridize with where their ranges overlap), and the Mountain Bluebirds (Sialia currucoides) in the mountainous regions of the West with its hovering flight (which can also hybridize with the Eastern though much less commonly do so). They are all members of the thrush (Turdidae) family of birds. 

    Eastern Bluebirds are between 6.5 to 7 inches in size and are the most widespread of the three species, including ranging as far south as Nicaragua and the eastern half of the U.S and Canada. However, until the 1970’s bluebirds were in severe decline. The loss of nesting cavities and competition from invasives such as house sparrows and European starlings were the main reasons for these declines. In 1978, the North American Bluebird Society was formed and along with its efforts, bluebirds started to recover. 

    One of the ways that helped most was building proper bird boxes to fill in for missing tree cavities that bluebirds traditionally used and reducing competition from other birds such as house sparrows and European starlings. There are numerous boxes available for sale and you can build your own as well with plans available on the internet. One of the most important things to remember is keep the entrance hole no bigger than 1 ½ inches to keep starlings and larger birds out. 

    Next is proper placement. Bluebirds prefer edges and open habitats with native plants in a meadow or edge setting, and, if possible away, from buildings. Native plants are extremely important as pretty much all the food for the young will be insects and these insects evolved together with the native plants. Nonnative and especially invasive plants will Not supply the necessary amount of insects to allow the young to fledge. A nearby small tree or sapling is often good to allow not only the bluebirds a place to keep an eye on the nest but for the first flights for the young. Placing the bird box on a steel pole and then placing a predator baffle (such as a metal cone guard) around the pole to keep raccoons, snakes and other predators from accessing the nest works best. Keep it away from overhanging trees or fences that the predators can use to gain access or drop down onto the bird box as well. Cat/raccoon guards made of mesh placed around the entrance hole so it is difficult for these predators to reach inside is always a good idea. 

A bluebird box complete with predator baffles.

     House sparrows can be an issue, so if placing the bird box well away from buildings doesn’t help, you can construct a scare baffle that helps keep sparrows away made from monofilament line, and using PVC pipe entrances (sometimes referred to as a Gilbertson design) also works well. If they still persist, just recall that invasive house sparrows are not protected by law and the eggs can be removed. Boxes are often placed 200 feet apart, but some place them close together or even next to each other in the belief that if tree sparrows use one and bluebirds the other, they can both combine to drive off predators. 

    Many more tips and information on the things mentioned can be obtained by contacting your local bluebird society website and on the internet. Bluebirds will also roost in these boxes in the winter as well, so they can be useful year-round.

A female Eastern Bluebird brings nesting material into a bird box in Barcroft Park, Arlington, VA. Note the cat/raccoon guard at the front of the box entrance.

    Eastern Bluebirds can have 2-3 broods a year. They lay 3-6 pale blue eggs each time. These take 16-21 days to incubate and the young fledge after 16-21 days. Occasionally bluebirds will lay their eggs into other bluebird’s nest, particularly if there are not enough nest cavities present. Female bluebirds will also occasionally mate with more than one male, and so the male which helps feed the young may not always be feeding its own young. Eastern bluebirds are short to intermediate migrants. As they feed their young insects and prefer these for themselves, when the cold weather kills these food items off, they need to find other food sources or move south. They form winter flocks which can number over 200 and search for additional items to feed on. They often search for berries and fruits to tide them over, particularly liking wild grapes. They may also come to bird feeders that are stocked with mealworms, raisins, berries, and peanut butter mixes. 

    Bluebirds were significant in many native American cultures. They were symbols of spring for many tribes. For the Haudenosaunee (Iroquois) the singing of blue birds were said to drive off winter. The Cherokee associated them with the wind and thought they could influence the weather. To the Pueblo, the bluebirds were sons of the sun. To the Pima, bluebirds are a symbol of transformation. One of their legends says that bluebirds got their color from by bathing in magical blue water, originally being the color of clay and considering itself ugly. It took 4 days of daily bathing for the feathers to turn blue. Many clans are named after bluebirds in their own languages such as clans in the Pueblo, Hopi, and DinĂ© (Navajo). 

    So please keep an eye out for bluebirds or listen to their songs (which many people think sounds like “Tru-ly , Tru-ly”) and perhaps encourage them into your yards using some of the information here.

Tuesday, May 10, 2022

City Nature Challenge DC 2022 Initial Report

    This year's City Nature Challenge was another great global citizen science event. 445 cities participated world wide representing 47 countries, with 64,095 people participating making 1,568,469 observations of 50,167 different species! While this year like the last two years was not seen as a world wide competition, La Paz would have won the competition, with 137,374 observations made by 4,305 people to find 4,388 species. But our region did extremely well! The DC region, which included Arlington and the rest of the Metropolitan region well into Maryland and even with one county in West Virginia, was impressive! You can skip the "Global Project" part as that was a multi-city project with any of the rankings.
    Had this been a competition, the DC region would have placed 5th in the number of observations with 38,148 observations. We would have placed in 7th in number of species with 2,576 species. Not bad when comparing yourself with some tropical cities like Rio where they have such tremendous biodiversity. But where we really stood out was in the total number of participants. DC came in 2nd with 2,110 people participating making observations! That's just fantastic, as not only are the results data mined by researchers world wide as part of citizen science, but also shows the interest that this area has in the natural world.
    Locally the most common observation were Mayapples with 346 observations, followed by American Robins with 250 observations, then Garlic Mustard (an invasive) with 249 observations in our area. Rounding this up was Poison Ivy again with 249 observations and Christmas Ferns with 241 local observations. Something that stood out to me was the number of Wild Turkeys seen in the DC area with 24 observations. They are getting more common each year. Another thing that stood out was the good number that were Research Grade in our area, meaning they were peer confirmed with two or more identifiers agreeing with the observations. 20,800 or 54.38% of these observations were Research Grade. This year we concentrated on getting more people to not only make observations, but also getting them identified. We had 1,014 Identifiers this time around, with TCAL12345 (don't know his real name) but a master naturalist, being the top local Identifier. Congrats to this person who identified 4,370 observations. In fact, we had the most Identifiers world wide! I take special pride in this, as I along with Deborah Barber, were part of the team of setting up ID nights with taxon resource specialists to help identify the observations. Thank you to all you taxon resource specialists and others who helped bring this distinction to our area! Most of the observations were of plants with 1,426 observed, or 48.75% of the things seen out the 2,974 species observed.
    Personally, I was very happy with what I did this year. I placed second in the number of observations and species for DC (31 worldwide for observations, but 7th in number of species world-wide, a happy accomplishment). I devoted what time I could this time around, but had some commitments during the 4 day period. I had my wedding anniversary for example, which I of course couldn't miss, or my wife would kill me! I also had an invite to attend the Washington Biologists' Field Club shad bake at their headquarters on Plummers Island, which many say is the most studied island in the country. I've been under consideration to join this storied 120 year old field biologist club that only has 65 active members, and so I was not going to turn down the invite which had been stalled due to COVID. This however led to my two favorite observations for this City Nature Challenge, both for very different reasons.
    The first was of an Eastern Copperhead, the only venomous snake we have within the Beltway. He was basking right next to the impromptu outhouse that was set-up on the island. It was quite a surprise to everyone when it was found it, especially for the botanists that make up most of the Club. This was a neonate, a very young copperhead, complete with its yellowish pea-green tail. This is a caudal lure. The young snake wiggles the tail tip which may appear to be alive and attract another predator such a skink (lizard) to try and catch it, and thus become food for the snake. The color fades fairly quickly after a few sheds and so this was a very young snake. It was very patient and as usual very non-threatening. Always neat to find one.
    The other one of my favorite finds was a very rare plant, the Coville's Phacelia. I foundit within yards of their cabin head quarters. This was not only great due ti its imited distribution and raraity, but also because the original scientist who discovered it, F.C. Coville, was a Washington Biologists' Field Club member, who made the discovery right there on the same island. This was a very special treat for me. More about htis rare plant here:
    Locally in Arlington, which falls into the DC count circle, there were 140 observers, who made 4,252 observations of 924 species, with 324 identifiers. A good showing. I'll look into what they observed to see if there are any locally rare species to investigate, or to see if there are new invasives that we should also investigate. You can see the Arlington results here: https://www.inaturalist.org/observations?place_id=1719&project_id=city-nature-challenge-2022-washington-dc-metro-area&verifiable=any
    This infographic gives the best summary of what went on. Thanks to Ana Ka'ahnui for putting together this information in the final infographic. All in all, a good City Nature Challenge! Congrats to all! I will have some work to do see what information I can glean locally, but until then, thanks to everyone who made this happen! You did a great job and should be proud of these efforts! You can click on any of the images to make them bigger. Until next year, thanks again for making this year such a success!

Wednesday, April 6, 2022

Wild Columbine

 

    Wild Columbine (Aquilegia canadensis) is a beautiful flower in the Ranunculus Family with all sorts of folklore. It has several common names: American Columbine, Red Columbine, Eastern Red Columbine, Canadian Columbine, Eastern Columbine, Rock Bells, Rock Lily, Cluckies, Bells, Honeysuckle, Jack-in-Trousers, Granny's Nightcap, Alaly, Meeting Houses, Turk's Cap, and Culverwort. Lots of folklore is tied in with their common and scientific names. For instance, Culverwort, comes from the Saxon culfre meaning "pigeon" and wyrt meaning "herb". As far as their most common name, Columbine is derived from the Latin for "dove" due to the resemblance of the inverted flower to five doves clustered all together. This is also why another name of Meeting Houses is also used. Aquilegia the Genus name also has a meaning. It comes from the Latin word for "eagle" because the flower's spurs are said to resemble an eagle's talons. The species name canadensis is due to its home range. The reference to "eagles", as well as its presence in many coats of arms, even won it favor to a small but vocal committee that wanted Wild Columbine to serve as the national flower. They failed in this attempt, though one species, Aquilegia caerulea, was chosen as the state flower for Colorado.

The columbine's flowers spurs resemble eagle talons.


    It is probably just as well that it is not our national flower since it has other symbolic meanings as well. Columbine is the symbol of cuckoldry and a deserted lover in the Victorian language of flowers. It was considered an insult to give it to a woman and bad luck to give it to a man, or the other way. Either way it was not a proper gift. 
    Columbines have been used medicinally in Europe for centuries to cure everything from headaches to small pox. Many tribes also used Wild Columbine for many reasons. According to North American ethnobotanist Daniel Moerman, the Cherokee used it for heart trouble. The Haudenosaunee (Iroquois) used it for treating poison ivy and other itches, and the roots for for kidneys. The Meskwaki used it for diarrhea, stomach and bowel trouble, and as well as mixing the seeds with tobacco for smoking. They even used the smoked seeds as a love potion. The Ojibwa also used it for stomach troubles. The Omaha, Ponca and Pawnee used it for headaches, as well as for perfume. As they also have astringent and diuretic properties, and have prussic acid that can have a narcotic effect on some people, they can be potentially poisonous as well. However, the flowers themselves are sometimes considered edible.

The red tubular flowers are very attractive to hummingbirds.

    The flowers of our local Eastern Columbine are red and tubular. They are designed to attract and be pollinated by the long tongues of hummingbirds who prefer and can see the color red, that many insects don't see. But some bees and other insects learn to cheat and eat a hole at the end of the spur to get to the nectar, bypassing any pollination. Our Eastern Red Columbines is a host plant to 12 different caterpillars. 

In the wild, Wild Columbine is often found growing out of rocks or other niches where there's little competition from other plants. 

    Wild Columbine is an easy to grow perennial in gardens. The seeds are easy to propagate, but do not like competition from other plants. They normally grow in rocky situations with little competition, but are not picky about soil conditions, whether dry or wet conditions, growing to about 3ft tall. While they can take full sun, they prefer some shade, even growing occasionally under evergreens. They will self seed for many years and can take both partial shade and sun. They have few garden pests. They occasionally get Columbine Sawfly, Pristiphora rufipes, and the Leaf Miner Phytomyza aquilegiae, but otherwise are relatively pest free. Most mammals do not try and eat the leaves, it even being deer resistant to a degree. 

Wild columbine growing out of the cinder blocks that line my drive way.

    This plant has attractive foliage, and as mentioned, except that it does not like competition, is very adaptable. Picked to be the Virginia Flower of the Year for 1998 and the North Carolina Wildflower of the Year in 1987, this plant has a lot going for it both in the garden and in the wild. Whether planted to attract hummingbirds or as an attractive spring flower, this plant deserves more attention. I always enjoy mine, which self-seeds along the rock wall of my driveway. It is carefree and pops up in any opening along my old driveway. 

Wild Columbine self-seeding along my driveway.

Thursday, March 31, 2022

Jack-in-the-pulpit

 

          Jack-in-the-pulpit (Arisaema triphyllum) has over 30 common names: Indian Turnip, Wild Turnip, Marsh Pepper, Pepper Turnip, Bog Onion, Brown Dragon (due to the burning taste of the raw plant), Dragon Turnip (due to its turnip-shaped corm), Starchwort, Wake-Robin, Dragon Root, Marsh Turnip, Swamp Turnip, Devil’s Ear, Priest’s Pintle, Indian Cradle, Memory Root, Cuckoo Plant, Three-leaved Arum, Parson-in-the Pulpit, Lady-in-a-Chaise, Lords-and-Ladies, and Cuckoo Pint to name a few. Some authorities recognize 3 species and others simply lump them into one (as if there wasn’t enough confusion with the common names). It’s most common name stems from the flower structure: the “jack” is the spadix or club-like part who stands within the pulpit which is the spathe or curved cover or hood overtop. It ranges from Canada to Florida, west of Kansas. The flower color can be quite variable, especially being yellow or dark striped.

One for the various shades of Jacks.

            The plant is a member of the Arum family (a word that gets its meaning from an Arabic word for “fire”) and as such protects itself by producing calcium oxalate crystals. These crystals can cause a severe burning sensation if it’s eaten raw. It can cause mechanical damage as well. Some people even get skin irritations or blisters from skin contact with it. It use to be a country trick to try and get someone to bite it and suffer the consequences. There is even a story of a Meskwaki tribe who got its revenge on the larger Lakota (Sioux) tribe by inviting them to dinner and then feeding them raw jack-in-the-pulpit in the meat (and then attacking them when they were in great discomfort). Some people have even died from swollen throats after ingesting it. While birds and others can eat the bright red fruits, it can cause issues with people. When we process the seeds for planting, we usually wear gloves and make sure not touch our faces or eyes. 

All parts of the plant, including the green berries, are toxic raw.

            Having said that, a few of its common names point to its edible uses. When thoroughly dried (6 months or so) and roasted, it was eaten like potato chips or made into a flour (which reportedly has a chocolate-like taste).

A Jack with the two stems that denotes this as a female plant.


The ripe fruits turn red and are quite attractive, though still toxic to humans.

  It was also used quite a bit medicinally. North American tribal ethnobotanist Daniel Moerman lists many varied uses: The Cherokee used it for skin diseases, for flatulence, for colds, for intestinal worms, and for boils. The Chippewa (as well as the Menominee and Ojibwa) used it as an eye medicine. The Iroquois were said to even use it as contraceptive along with treating headaches, bruises, sores, fevers, and children’s diarrhea. Interestingly, instead of using as a contraceptive, they used it induce pregnancy in horses. The Pawnee likes to use the seeds in their gourd shells to serve as rattles (as well as for headaches and rheumatism). Some tribes had to ceremoniously eat the raw leaves as an entrance into manhood. During the 16th and 17th century, people used starch made from the roots as a stiffener for clothes, thus the name Starchwort. The bright red berries were also used to make a red dye. During the Civil War, the Confederate states were blockaded from getting most goods. So they tried to find alternatives especially in food and medicines. The person in charge of compiling all of this was Dr. Francis Peyre Porcher who compiled a manuscript entitled the "Resources of the Southern Fields and Forests, Medical, Economical, and Agricultural Being Also a Medical Botany of the Confederate States" commonly referred to as the Confederate Ethnobotany. About "Wake Robins", as he called them as they often open when robins are nesting, he compiled several uses. He described how mixing the fresh roots with honey or syrup could be used for sore throats, particularly in children. He said it was also useful in treating rheumatism and a concoction of the sliced roots for poison ivy. He also described its use for an expectorant, for treating ringworm, skin diseases, in addition to it being used for making bread. 

These young Jacks are many years from producing any flowers, and even more so from producing fruits. At this stage many people misidentify them as trilliums or even poison ivy. 
            This plant has an interesting development in that it can change sex throughout its life. When it first starts growing, it doesn’t produce any flowers. As it gets larger and stores enough nutrients, it will start producing male flowers, have one leaf stalk with three leaflets and be small in size. The flowers on these have a small opening at its base that allows pollinators (often fungus gnats or other small creatures attracted to rotting flesh smells) to escape. Once it builds-up its store of nutrients, it can finally invest in a larger, female flower with two stalks with three leaflets that lacks the opening at the base of the flower. If pollinated, this may then sap so much energy from it that it may revert back to the “cheaper” male plant. This cycle is referred to as sequential hermaphroditism. They can live for 20 years so are a long-lived plant. 



    


Sunday, March 27, 2022

Common Blue (Confederate) Violets

 

Common Blue or Confederate Violets 

    So the Common Blue (Confederate) Violet (Viola sororia) is so routinely seen in our yards that they are often ignored. They however have some interesting natural history and folklore tied to them. Indeed much of what follows can also be applied to the other 36 or so species found in both Virginia and Maryland as well. 

    First off, some folklore of violets in general. Violets are said to be the symbol of Athens, as the legendary founder Ion was given violets by nymphs when he arrived at the future place for the city itself. Indeed the common for violets in Greece is usually thought of to be Io. The connection to Greece also goes back to several legends concerning their gods, which were subsequently also applied to Rome. The king of the gods Zeus (Jupiter in Rome) was said to have fallen in love with a beautiful maiden called Io (Viola in Rome). In other versions she is a magical nymph, the daughter of a river god and King Argos. Regardless, Zeus (Jupiter) was constantly after her and tricked her into making love to him. His wife Hera (Juno in Rome) found out about this affair. This was particularly bad as Hera is the goddess of marriage and she wanted to teach the maiden a lesson that would be passed on to all mortals. Here the story differs even more depending on who tells it, but in all of them, Io (Viola) ends up losing. In one version, Hera (Juno) catches up to the mortal and changes her into a white heifer with gadflies biting her until the end of days, and Zeus (Jupiter) was unable to do anything about it. Her tears became the violets. In another version, Zeus (Jupiter) finds out that Hera (Juno) is jealous and angry and so he changed Io (Viola) into a cow, as what Hera has planned would have been so much worse and so she can't find her. Here either her tears turn into the violets, or Zeus (Jupiter) makes the violets appear so she can have something beside grass to eat. No matter what version, Io (Viola) is the ultimate loser. 

    In Rome, people saw the violet as a symbol of innocence and modesty, and would often lay violets on children's graves. Romans also thought that wine made from violet blossoms meant that you could not get drunk. Other Romans used it to prevent hangovers. Medieval Christian folklore believed that the flowers sprung from Adam's tears. Other medieval Christians believed that the flowers of violets once were tall and stood upright, but that changed on Mount Calvary where Jesus was crucified when the shadow of the cross fell on them. Ever since violets have bowed in shame of being present in such sad events. It has been traditional to use the flowers in Good Friday decor around Easter since then as well. Violets are also said to be Mohammed's favorite flower.

Common Blue Violet
    Violets are also said to be a symbol of the Bonapartist movement. Napoleon Bonaparte was said to carry violet flowers with him in his pocket in a locket. It was said that once he was captured and exiled, that he would "return with the violets' of the spring." It was also said to be his wife's favorite, used for their wedding, anniversaries, and finally on her grave. Napoleon was sometimes called "La Coporal de Viollette." His followers used the plant as a code and symbols for their communications. The pansy, a cultivated variety of violet, is said to come from the word "pensee" meaning thought and sentiment. Indeed violets have over 200 common names relating to love and sentiment. 

    Violets also have some other traits in common. Most violets are Myrmecochorous, meaning that seeds have an attachment called an elaiosome that some species of ants find delectable. They then take the seeds to their nests, eat the elaiosome, and discard the seed into their waste areas, planted below ground and guarded by ants. Ants therefore are the main seed dispersers. For more on this interesting way of spreading seeds see my Capital Naturalist Blog here: http://capitalnaturalist.blogspot.com/2014/04/myrmecochory-ants-in-our-plants.html

    For many violets, including the Common Blue (Confederate) Violet, they also have another reason they're so common. The flowers are easy to see when they're in bloom for pollinators to find. These showy blooms are said to be Chasmogomous, Greek for "open marriage" with the petals highlighting around the pollen-bearing open flower head. However, especially early in the season, pollinators may still not find these flowers to pollinate. Therefore, especially for those spring blooming early species, they hedge their bets by producing Cleistogomous flowers. This is Greek for "closed marriage" and involve flowers that never open. These instead self pollinate, which while not great for genetics, does mean they will always produce seeds for the ants and to germinate. These are usually low to the ground and near the main stem, as they have no need for any pollinators to spot them. This is one reason why some species of violets are so common in our yards. 

A Variegated Fritillary laying eggs on Common Blue Violet
    Violets are said to host 30 caterpillar species, including many of our Fritillary butterfly species. By naturally having their flowers pointing downwards, they protect their chasmogomous flowers from the rain and losing of pollen. Now our Common Blue Violets come in some various color forms. This includes the Confederate form which is commonly found growing side by side with the more common blue colored ones. They are one and the same violet species. 

A Confederate Violet, just another color form of the Common Blue Violet

    Violets are edible, both the leaves and the flowers. Most prefer to eat the blue colored or perhaps white colored ones over the yellow colored ones, some saying these are much more tasty. The flowers add color to salads and most say are better tasting than the leaves. But both leaves and blooms are full of Vitamin C and A. The blooms are often candied or added as a garnish and are pectin rich. These are more often used in syrups, brews, teas, wine, and salads. Having said that, the leaves especially are full of saponins and when eaten in excess can lead to digestive issues. 

    Herbalists have used violets for insomnia, epilepsy, pleurisy, ulcers, eye inflammation, rheumatism, as a laxative, as cough medicine, pain relievers (due to the presence of salicylic acids such as in aspirin), and for treating cancers. The heart shaped leaves led to another name: Heartease, for the idea drawn from the Doctrine of Signatures that it would be good for treating heart illness. The Doctrine of Signatures is a belief that some higher power (god) placed upon the earth cures for most illnesses and placed a sign or signature to let people know what they were good for. The heart shaped leaves meant that some people believed it would be good for hearts. Not just for illness, but also for love potions or as aphrodisiac. 

Common Blue Violets with their heart shaped leaves.

    The Common Blue Violet according to the great North American Ethnobotanist Daniel Moermann, was used by the Cherokee for treating headaches, dysentery, colds, coughs, boils, and used as a spring tonic and for blood disorders. They also used it to keep insects out of corn.  

    The Common Blue (Confederate) Violet is the state flower for Illinois, New Jersey, Rhode Island, and Wisconsin.  Although common, there's much more to these spring blooms than meets the eye. For more on this neat plant, please check out this Capital Naturalist YouTube Video:  https://www.youtube.com/watch?v=GWS_luiX9uM