01364nas a2200169 4500008004100000245006400041210006000105300001000165490000800175520087600183653002501059653001601084653001601100100002001116700002101136856003701157 2006 eng d00aA New Platanthera (Orchidaceae) from the Intermountain West0 aNew Platanthera Orchidaceae from the Intermountain West a19-310 v1083 a

Platanthera sparsiflora is a variable species to which Limnorchis ensifolia and L. laxiflora have been referred. Recently, authors have adopted L. ensifolia for a group of plants that have also been referred to L. laxiflora and P. sparsiflora. None of these existing names apply to a recently delineated but related group, here described as the new species P. tescamnis. This species is distinguished by a small column with short rostellum lobes that position the viscidia above the orifice of the spur. The species exhibits ecological preferences that are unique in the group, occurring at relatively low elevations and in comparatively dry habitats in a hot, arid region. It occurs across the Great Basin and Colorado Plateau and bordering areas in California, Nevada, Arizona, Utah, and Colorado.

10aIntermountain Region10aOrchidaceae10aPlatanthera1 aSheviak, C., J.1 aJennings, W., F. uhttp://dx.doi.org/10.3119/05-4.1