Platanthera obtusata Lindley 1835 ...

• Main Author: D. M. Moore Ed.
• Format: Text
• Language: unknown
• Published: Zenodo 1980
• Subjects: Biodiversity; Taxonomy; Plantae; Tracheophyta; Liliopsida; Asparagales; Orchidaceae; Platanthera; Platanthera obtusata; Arctic; Lindley; Webb; Fennoscandia; Lysiella oligantha; Siberia
• Online Access: https://dx.doi.org/10.5281/zenodo.6283111; https://zenodo.org/record/6283111

5. P. obtusata (Pursh) Lindley, op. cit. 284 (1835). Roots cord-like, fleshy but scarcely tuberous. Plant 6-20 cm. Foliage- leaf solitary, basal, 4-6 x 1 -5-2 cm, elliptical, tapered to a sheath­ ing base which is largely enclosed in a hyaline sheath representing a second basal leaf; a third leaf, small and bract-like, is present on upper part of stem. Spike short, rather dense; flowers 3-6, greenish-white. Perianth-segments2-3 mm. Labellum 3-3-5 mm, rhombic-lanceolate, horizontal or somewhat deflexed. Spur 2-5-3 mm, curved, half as long as ovary. 2n= 126. 1 By D. A. Webb. Calcareous mountain heaths. Arctic Fennoscandia. No Su. (E. & E. C. Asia, North America.) The European plant belongs to subsp.oligantha (Turcz.) Hultén, Lunds Univ. Ârsskr. nov. ser., 39(1): 481 (1943) (P.oligantha Turcz., Lysiella oligantha (Turcz.) Nevski), which is also found in E. Siberia. Subsp.obtusata, which is confined to America, has an obovate leaf, a laxer spike, a longer, narrower labellum and a longer spur. Plants from E. ... : Published as part of D. M. Moore (ed.), 1980, CCIII Orchidaceae, pp. 325-350 in Flora Europaea, Vol 5: Alismataceae to Orchidaceae, Camebridge :Cambridge University Press on pages 331-332, DOI: 10.5281/zenodo.215522 ...