| Listera convallarioides | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Epidendroideae |
| Genus: | Listera |
| Species: | L. convallarioides |
| Binomial name | |
| Listera convallarioides (Sw.) Nutt. |
|
Listera convallarioides is a species of orchid known by the common names broad-lipped twayblade and broad-leaved twayblade. It is native to much of North America from Alaska to eastern Canada and south to higher elevation habitat in California and Arizona, the Great Lakes, and New England. It is a plant of cool, moist, dim habitat, such as woods and forest, as well as swamps and streambanks. It is a rhizomatous perennial herb growing erect 10 to 35 centimeters tall. It has one pair of green oval leaves each up to 7 centimeters long near the base of the stem. The inflorescence is a small raceme of green or yellow-green flowers, sometimes slightly purple-tinged. Each has usually 3 reflexed lance-shaped sepals, 2 similar petals, and one petal known as the lip, which is longer, wedge-shaped, and notched at the tip. The plant sometimes forms large colonies, creating a groundcover.[1] It is known to hybridize with Listera auriculata.[1]