Platanthera chorisiana (Cham.) Rchb.
FamilyOrchidaceae — APG family: Orchidaceae
SynonymsPseudodiphryllum chorisianus (Cham.) Nevski, Limnorchis chorisiana (Cham.) J. P. Anders., Habenaria chorisiana Cham., Peristylus chorisianus (Cham.) Hook.
DescriptionStem from fleshy, rootlike tuberoids, 6-12 cm tall, with bladeless sheath at base and 2 broad leaves at middle, the lower with round apex, the upper somewhat more acute, sometimes also with small bractlike leaf in upper part; spike few-flowered; bracts lanceolate, the lower longer than the flowers, acute; flowers very small, green- ish; perianth leaves oblong, ovate, or obovate; lip orbicular, fleshy; spur short, sacklike.
EcologyWet places, Sphagnum bogs.
The corresponding Asiatic plant is taller and many-flowered, and grows in meadows and birch forests (var. elata Finet).
Hultén's Flora About

This is a digital representation of Eric Hultén’s ‘Flora of Alaska and Neighboring Territories: A Manual of the Vascular Plants’, which was published by Stanford University Press in 1968. The book was digitized by C. Webb (at UAMN) as part of the Flora of Alaska project, with funding by the US NSF (Grant 1759964 to Ickert-Bond & Webb), and with permission of Stanford University Press. Data and images © 1968 Board of Trustees of the Leland Stanford Jr. Univ. Usage licence: Creative Commons BY-NC-SA 4.0. NB: You may find OCR errors; please refer to the hard-copy if in doubt.