Platanthera transversa (Suksd.) R.M.Bateman
royal rein orchid
Orchidaceae (Orchid family)

Introduction to Vascular Plants

Photograph

© Adolf Ceska     (Photo ID #5653)


Map

E-Flora BC Static Map

Distribution of Platanthera transversa
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Species Information

General:
Perennial herb from tubers, 1-4 cm long, with a few fibrous roots; stems 15-55 cm tall, 1-3 mm wide.
Leaves:
Basal 2 to 5, oblanceolate, 6-18 cm long, 1-4 cm wide; stem leaves bractlike.
Flowers:
Inflorescence a terminal, spikelike raceme, 7-25 cm long, open to densely-flowered, the flowers small, white to yellowish, clovelike scent noticeable in evenings; sepals 2-5.5 mm long, lanceolate, the midvein green, the upper sepal pointed forward; petals 2-5.5 mm long, lanceolate, the midvein green, spreading, somewhat bent back; lip 2.5-5 mm long, oblong to somewhat egg-shaped, white, pointed forward or down; spur 6-10 mm long, horizontal, straight, pointed backward.
Fruits:
Capsules, ascending to erect.
Notes:
Where P. candida, P. elongata, and P. transversa grow together, P. transversa blooms first.

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Dry, open forests, forest margins and rocky bluffs in the lowland to montane zones; infrequent in SW BC (Vancouver Island); S to CA.

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Piperia transversa Suksd.