Pseudorchis albida subsp. straminea

(Fernald) Á. Löve & D. Löve

Taxon 18: 312. 1969.

Illustrated
Basionym: Habenaria straminea Fernald Rhodora 28: 174. 1926
Synonyms: Habenaria albida var. straminea (Fernald) Morris & Eames Leucorchis albida var. subalpina (Neuman) Hylander Platanthera albida var. straminea (Fernald) Luer
Treatment appears in FNA Volume 26. Treatment on page 549. Mentioned on page 548, 550.

Plants erect, 5–35 cm. Leaves: blades oblong-obovate to elliptic or lanceolate, 20–90 × 6–40 mm, distal blades narrower. Inflorescences: bracts lanceolate, to 15 × 3 mm, proximal bracts often spreading, conspicuously exceeding flowers. Flowers dull greenish yellow or creamy; perianth nodding, ovaries ascending; dorsal sepal concave, forming hood over column, 2.3–4 × 1–2 mm; lateral sepals widespreading, ovatelanceolate, 3–4 × 1.2–1.8 mm; petals narrowly ovate, 3 × 1.5 mm, associated with dorsal sepal; lip 3-lobed to 1/2 its length, 2–5 × 2–3 mm, lateral lobes lanceolate, slightly falcate, middle lobe oblong, slightly longer than laterals, spur cylindric to clavate, 2–3 mm. Capsules ascending, ellipsoid-obovoid, 6 × 4 mm. 2n = 40, 42.


Phenology: Flowering summer.
Habitat: Wet to rather dry tundra and limestone barrens
Elevation: 0–700 m

Distribution

V26 1121-distribution-map.jpg

Greenland, Nfld. and Labr. (Nfld.), Que., n Europe, Atlantic Islands (Faeroe Islands), Atlantic Islands (Iceland)

Discussion

The proper status of the American plants is not clear. Originally described as Habenaria straminea Fernald, the plants of North America, Iceland, and the Faeroe Islands were distinguished by a more yellowish and slightly larger perianth than the common European form. These seemingly minor differences are inconsistent, however, and the plants have generally been treated as only infraspecifically distinct. Because of the occurrence of plants in northern and western Scandinavia, E. Hultén (1958) treated them as Leucorchis albida var. subalpina, and D. M. Moore (1980) treated them as Pseudorchis albida subsp. straminea. Recently, however, L.-G. Reinhammer (1995) presented evidence supporting the recognition of two species. His sample, limited to western Scandinavia and a single Icelandic site, may not be representative of American plants, and our populations should be studied accordingly.

Selected References

None.

Lower Taxa

None.

"narrower" is not a number.

self-pollination +
Charles J. Sheviak +
(Fernald) Á. Löve & D. Löve +
spurred +  and sheathing +
Habenaria straminea +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
2 cm20 mm <br />0.02 m <br /> (9 cm90 mm <br />0.09 m <br />) +
oblong-obovate +  and elliptic or lanceolate +
0.6 cm6 mm <br />0.006 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
lanceolate +
0 cm0 mm <br />0 m <br /> (?) +  and 0.3 cm3 mm <br />0.003 m <br /> (?) +
6 cm60 mm <br />0.06 m <br /> (?) +
ellipsoid-obovoid +
4 cm40 mm <br />0.04 m <br /> (?) +
Greenland +, Nfld. and Labr. (Nfld.) +, Que. +, n Europe +, Atlantic Islands (Faeroe Islands) +  and Atlantic Islands (Iceland) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0–700 m +
3-merous +, sessile +  and pedicellate +
creamy +, greenish yellow +  and dull +
several;many +
Wet to rather dry tundra and limestone barrens +
lateral +  and terminal +
falcate +  and lanceolate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ovatelanceolate +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
ascending-spreading +
cauline +  and basal +
Few (?) +  and Several (?) +
reduced +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
3-lobed +
larger +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
differing in form and color +
1-many-flowered +  and cymose +
pendent +  and erect +
1.5 cm15 mm <br />0.015 m <br /> (?) +
Flowering summer. +
aerial +  and subterranean +
slender +
minute +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
Illustrated +
cylindric +  and clavate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
pendent +  and erect +
proliferous +
thickened +  and stout +
Habenaria albida var. straminea +, Leucorchis albida var. subalpina +  and Platanthera albida var. straminea +
Pseudorchis albida subsp. straminea +
Pseudorchis albida +
subspecies +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +