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Platanthera transversa
(Suksd.) R.M.Bateman
No occurrences found
(redirected from:
Piperia transversa
Suksd.)
Family:
Orchidaceae
royal rein orchid
[
Piperia transversa
Suksd.]
Patrick Alexander
FNA
Resources
James D. Ackerman & Randall Morgan in Flora of North America (vol. 26)
Plants 12-57 cm. Stems basally swollen above tuberoid, 0.7-4.5 mm diam. distal to leaves; bracts 3-15. Leaves prostrate; blade 6-19 × 1-4.5 cm. Inflorescences ± densely flowered, 3.5-32 cm; rachis ± length of peduncle; bracts 3-12 mm. Flowers ± white with green or yellow-green midveins, fragrance nocturnal, strong, clovelike; sepals 2.5-4.5 × 1-2 mm; dorsal sepal projecting forward between petals, oblong to lanceolate; lateral sepals reflexed-spreading, obliquely oblong-lanceolate; petals reflexed-spreading, oblique to falcate, oblong, 2-5 × 1-2 mm; lip straight to ± deflexed, oblong to ovate-elliptic, 2.2-5.3 × 1-2.5 mm; spur ± horizontal, straight, 7-12 mm; viscidia oblong, 0.5-0.7 × 0.2-0.3 mm; rostellum blunt. Capsules 4-13 mm. Seeds cinnamon brown. 2n = 42. Flowering late May--Aug. Conifer and mixed evergreen forest, oak woodlands, chaparral; 0--2600 m; B.C.; Calif., Oreg., Wash. Piperia transversa is pollinated by geometrid moths (J. D. Ackerman 1977).
Patrick Alexander
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