(pronounced: eye-SOH-tree-ah)


subtribe Pogoniinae. Of uncertain affinity. Isotria was included in a broadly defined Pogonia Jussieu.


Erect terrestrials from subterranean, rhizomes bearing terminal whorls of leaves. Flowers usually solitary, erect, terminal, sessile. Sepals and petals dissimilar, free, the sepals spreading, the petals parallel to and forming a hood over the column. Lip three-lobed, with a longitudinal callus. Column arcuate and clavate; pollinia 2, mealy.


A genus of two species native to eastern North America.

Care and Culture Card

See basic growing conditions and care information below.


McCartney, C. 1998. A rarity for the life list. Orchids 67(5):506-514.

Mehrhoff, L. J. 1983. Pollination in the genus Isotria (Orchidaceae). Amer. J. Bot. 70:1444-1453.

Vitt, P. and C. S. Campbell 1997. Reproductive biology of Isotria medeoloides (Orchidaceae). Rhodora 99(897):56-63.