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Folklore of the Forest Floor: Part 2

5/7/2014

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Picture
The Bird Girl, the 1938 work by sculptor Sylvia Shaw Judson, oversees the arrival of spring at Ryerson Woods.
by Luke Buckardt

The emergence of Wild Leeks (Allium tricoccum) in early April provides some of the first signs of green at Ryerson Woods in spring.[/caption]After some rain and a few warm days, the forest floor began its push to beat the leaves.    Spring ephemerals must take advantage of the slim margin of time between when it is warm enough to flower and when the leaves pop, cutting off light to the forest floor.  This two to three week period is perhaps the most active time of year for the forest floor, where hundreds of species quickly take advantage of sunlight in order to reproduce.  The leaf litter is suddenly changed from decay into a vivid carpet of green.  The flowering species have a very short time to reproduce and take advantage of pollinators.  Historically, this brief period every year was essential for Native Americans and early settlers.  The plants that grew were harvested for food and medicine, as well as many other resources.  Following the phenology of bloom is something scientists are fascinated by, and in recognizing these patterns, can determine the many uses of these spring ephemerals.
Perhaps the most common plant in Ryerson right now is the Wild Leek (Allium tricoccum), which can be seen in many of the wet areas of the preserve.   The Wild Leek, a type of onion, is a member of the lily family.  It, however, is unusual in the sense that it does not flower during this crucial time before trees leaf out.  The leek flowers in late June.   Leek is touted as a savory flavor, perhaps the most delicious of all of the native wild onions.  Settlers used the strong odor of the leek to cover the taste of spoiled food.  They have been used for centuries for food, but they were also thought to have some medicinal properties.   Chippewa tribes used it as a cure for the common cold, and also as an emetic, or something that forces vomiting.
Trout Lily (Erythromium albidum) is currently in bloom at Ryerson Woods.[/caption]Another common plant right now at Ryerson is the Trout Lily.  Trout lily (Erythromium albidum) is an abundant plant on throughout the floor, and can be seen flowering right now.  The flower opens downward, so to get a good look at it one must get low to the ground.  Trout lilies are fascinating flowers for a few reasons.  Most surprisingly, they are colonial.  A large swath of these flowers may actually be one individual plant.  The bulbs extent stems throughout the soil, and each year add growth from one initial bulb.  The flower gets its name due to the leaf spots present, which look very similar to the spots on a trout.  The flowers are open until they are fertilized by insects, and then whither away within a few days.  The trout lily is very interesting in that the flower is very sensitive to temperature.  In order to maximize the potential for pollination, it will not open until the air temperature is 55 degrees. This, according to the plant, is the right temperature for insect activity to be abundant, and therefore giving it a better chance at pollination.  Historically, this plant has been used for food as well as medicine.  Sioux tribes ate the bulbs, as they are high in nutrients.  Some of the first botanical literature cited the medical uses of the plant as a cure for gout, as well as a treatment for boils upon the skin.  Trout lilies are beautiful, and their colonies in some parts of the forest take up much of the current forest floor.

Perhaps one of the most well known spring ephemerals in the eastern forests is the Mayapple.  The Mayapple (Podophyllum peltatum) grows in every section of Ryerson Woods and can be easily located by their large, umbrella-like leaves.  The Latin name comes from the Greek word “podos”, or foot and “phyllon”, or leaf.  Early taxonomists believed the leaf resembled the webbed foot of a duck.  Mayapples are also colonial, and reproduced via rhizomes underground.  This is the reason you will see large “stands” of Mayapple in different parts of the forest.  The plant blooms in early to mid May, and has a large white flower attached to the stalk under the large leaf.  The flower is quickly pollinated, and the plant stays on the forest floor for up to three months while the fruit ripens.  The unripe fruit has a toxic resinoid in it called Podophyllum, and can be lethal to children or adults if consumed in large quantities.  However, these are no longer present once the fruit ripens and can be eaten.  It is said that they taste like strawberries.  The fruit was consumed by many woodland tribes, but also used in the unripe state as a purgative or emetic.  The Delaware tribe also used the unripe fruit to treat arthritis.

This blog post was written by Luke Buckardt, who assists Brushwood Center with social media.  Luke graduated from Northland College in 2012 with a degree in biology.  He grew up in Riverwoods and has roamed Ryerson Woods since he was young, knowing the preserve intimately.
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21850 N. Riverwoods Rd.
​Riverwoods, IL 60015

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