familyOrchidaceae
subfamilyOrchidaceae subfam. Orchidoideae
genusAmerorchis
speciesAmerorchis rotundifolia
Amerorchis rotundifolia
Ark. Bot., n. s. 7: 34. 1968.
Basionym: Orchis rotundifolia Banks ex Pursh Fl. Amer. Sept. 2: 588. 1814
Synonyms: Ponerorchis rotundifolia (Banks ex Pursh) Soó
Treatment appears in FNA Volume 26. Treatment on page 551.
Revision as of 21:38, 16 December 2019 by FNA>Volume Importer
Plants 7–33 cm. Leaves: blades 2.7–11 × 1.2–8 cm. Inflorescences: floral bracts lanceolate to linear, 5–15 × 1–5 mm, apex acute to acuminate. Flowers showy; sepals white to pale magenta, ovate to elliptic-oblong, 6–10 × 3–4 mm; petals white to pale magenta, ovate to lance-oblong, 5–6 mm, less than 1/2 as wide; lip white, prominently magenta-spotted, rarely with broad, longitudinal, reddish bars, ovate in outline, 6–9 × 4–8 mm, lateral lobes spreading, spur conspicuous, 2/3 as long as to equaling lip, slender. Capsules erect, ellipsoid. 2n = 42.
Phenology: Flowering Jun–Jul.
Habitat: Moist, often calcareous coniferous forests, thickets, fens, tundra
Elevation: 0–1200 m
Distribution
Greenland, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Maine, Mich., Minn., Mont., N.Y., Vt., Wis., Wyo.
Discussion
Selected References
None.
Lower Taxa
None.