Amerorchis rotundifolia

(Banks ex Pursh) Hultén

Ark. Bot., n. s. 7: 34. 1968.

IllustratedEndemic
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.

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

V26 1125-distribution-map.jpg

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.
... more about "Amerorchis rotundifolia"
self-pollination +
Acute (?) +  and Acuminate (?) +
Charles J. Sheviak +  and Paul M. Catling +
(Banks ex Pursh) Hultén +
Orchis rotundifolia +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
2.7 cm27 mm <br />0.027 m <br /> (11 cm110 mm <br />0.11 m <br />) +
obovate +, ovate +, orbiculate +  and broadly elliptic +
1.2cm;8cm +
ellipsoid +
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. +  and Wyo. +
0–1200 m +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
3-merous +, sessile +  and pedicellate +
few;several +
Moist, often calcareous coniferous forests, thickets, fens, tundra +
lateral +  and terminal +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
cauline +  and basal +
reduced +
magenta-spotted +  and white +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
larger +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
entire +  and crenate +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
0 +  and 1/2 +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 0.6 cm6 mm <br />0.006 m <br /> (?) +
clasping +  and sheathing +
inconspicuous +
Flowering Jun–Jul. +
Ark. Bot., n. s. +
aerial +  and subterranean +
slender +
minute +
white +  and pale magenta +
free +, distinct +, adnate +  and connate +
ovate +  and elliptic-oblong +
foliaceous +
not +  and alike +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Illustrated +  and Endemic +
conspicuous +
slender +
pendent +  and erect +
proliferous +
thickened +  and stout +
narrowly reniform +  and obcordate +
Ponerorchis rotundifolia +
Amerorchis rotundifolia +
Amerorchis +
species +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +