It was a high summer day as I enjoyed a customary hike around of Taughannock Falls State Park on the South and North Rim trails. Here sunlight filtered through the dense canopy, dappling the forest floor with shifting patches of light. Along the trail, my attention was drawn to a cluster of pink blossoms rising on slender, upright stems. Intrigued by their delicate beauty, I crouched down for a closer look. The plant rose above the forest floor, its trifoliate leaves broad and prominently veined, each leaflet slightly larger than I would have expected. These leaves seemed to anchor the plant to the shaded understory, while its flowers reached upward, as though eager to catch the fleeting rays of sun. I captured the plant in this photographs, later used it to identify Hylodesmum glutinosum, or Large-Flowered Tick Trefoil.
Characteristics of the Plant
The Large-Flowered Tick Trefoil is a striking member of the pea family (Fabaceae). Its pink, pea-like flowers are arranged in graceful racemes along the upper portions of its stems, their vibrant color contrasting beautifully with the green foliage around them. The leaves, broad and trifoliate, lend the plant its distinctive appearance. The name “tick trefoil” refers to the plant’s seed pods, which are flat and segmented, equipped with tiny hooks that cling stubbornly to passing animals or hikers, hitchhiking their way to new locations.
The plant is native to eastern North America, including the forests and trails of New York State. Its preference for rich, well-drained soils in partially shaded woodlands makes it a common sight in places like Taughannock Falls State Park. Blooming from mid to late summer, it provides an essential nectar source for bees and other pollinators, playing its part in the intricate web of the forest ecosystem.
Etymology of the Name
The genus name, Hylodesmum, was established only twenty-five years ago when the plant was reclassified from the genus Desmodium to a new genus within the tribe Desmodieae. The name reflects its forested habitat, with “hylo” derived from the Greek word for “wood” or “forest.” Previously described in 1802 as Hedysarum glutinosum and later placed in Desmodium, the species name glutinosum remains unchanged, meaning “sticky” in Latin. This aptly describes the plant’s seed pods, which adhere to anything that brushes past them. Together, these names encapsulate both the botanical structure and the unique dispersal strategy of this plant.
History and Folklore
Native Americans and early settlers were intimately familiar with tick trefoils. The plant’s seeds, notorious for clinging to clothing and fur, earned it a reputation as a nuisance, but its resilience and utility could not be overlooked. Indigenous peoples utilized various parts of the plant for medicinal purposes. The roots and leaves were brewed into teas to treat fevers and digestive ailments, while poultices made from the leaves were applied to wounds to promote healing. Such uses highlight the depth of knowledge early inhabitants had about their environment.
The plant’s sticky seed pods also became the subject of folklore. Children in rural communities would playfully call it “hitchhiker’s weed,” competing to see who could collect the most seeds on their clothing during outdoor adventures. These seeds, so adept at attaching themselves to passersby, were seen as symbols of persistence and adaptability, traits that many admired.
Uses and Ecological Role
While Hylodesmum glutinosum is not commonly cultivated, its ecological contributions are significant. As a member of the Fabaceae family, it has the ability to fix nitrogen in the soil through a symbiotic relationship with rhizobia bacteria in its root nodules. This makes it a valuable plant in maintaining soil fertility in its native ecosystems. Its flowers attract pollinators like bees and butterflies, ensuring that the forest remains vibrant and full of life.
In addition to its ecological importance, the plant’s seeds have a curious modern use: they’ve been studied for their ability to help detect movement in the environment. Researchers have examined the sticky pods’ structure as a natural model for creating adhesives and tracking devices, proving once again that even the smallest details in nature can inspire human ingenuity.
A Moment of Reflection
As I rose to my feet, brushing the leaf litter from my hands, I felt a renewed sense of wonder for the intricate lives of the plants surrounding me. The Large-Flowered Tick Trefoil, with its vivid pink flowers and ingenious seed pods, seemed to embody the essence of the forest: a harmonious blend of beauty, resilience, and interconnection.
Walking away, I carried with me not just the memory of its vibrant blooms, a deep respect for its role in the natural world. In the quiet of Taughannock’s wooded trails, Hylodesmum glutinosum had shared its story, a tale of persistence, adaptation, and the hidden wonders that flourish when we take the time to notice.
Michael Stephen Wills Photography 
Beautifully written
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