Platanthera psycodes

(Linnaeus) Lindley

Gen. Sp. Orchid. Pl., 294. 1835.

Endemic
Basionym: Orchis psycodes Linnaeus Sp. Pl. 2: 943. 1753
Synonyms: Habenaria psycodes (Linnaeus) Sprengel
Treatment appears in FNA Volume 26. Treatment on page 565. Mentioned on page 552, 566, 567.

Plants 14–101 cm. Leaves 2–5, widespreading, recurved to somewhat ascending, scattered along stem, gradually reduced to bracts distally; blade lanceolate, oblongelliptic, or oblong-obovate, 5–22 × 1.5–7 cm. Spikes lax to very dense. Flowers resupinate, showy, lavender to rose-purple, rarely white; lateral sepals reflexed to somewhat spreading; petals spatulate to broadly obovate or cuneate-oblong, margins dentate-lacerate to sparsely fringed; lip descending to somewhat porrect, deeply 3-lobed, without basal thickening, 5–13 × 5–17 mm, distal margins of lobes fringed, sometimes deeply, lateral lobes often reflexed or slightly elevated above middle lobe, broadly to narrowly cuneate, middle lobe sometimes reflexed, broadly cuneate-flabellate, often emarginate to 2-fid; spur slenderly cylindric to slightly clavate, 12–22 mm; rostellum lobes nearly parallel, directed downward, short, rounded; pollinaria nearly straight; pollinia remaining enclosed within anther sacs; viscidia suborbiculate to broadly elliptic; ovary slender to stout, 9–16 mm. 2n = 42.


Phenology: Flowering Jun–Aug(–Sep).
Habitat: Alluvial and swamp forests, stream banks, riparian meadows, moist and seeping slopes, marshes, roadside banks, ditches, old fields
Elevation: 0–2000 m

Distribution

V26 1153-distribution-map.jpg

Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Conn., Ga., Ill., Ind., Iowa, Ky., Maine, Mass., Mich., Minn., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Vt., Va., W.Va., Wis.

Discussion

Platanthera psycodes is known to hybridize with P. lacera in the northeasternmost portion of its range, where the species bloom simultaneously. Such hybrids are known as P. ×andrewsii (M. White) Luer; see the discussion under P. lacera. A few specimens also suggest very rare hybridization with P. grandiflora.

Selected References

None.

Lower Taxa

None.
... more about "Platanthera psycodes"
self-pollination +
Charles J. Sheviak +
(Linnaeus) Lindley +
Orchis psycodes +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
5 cm50 mm <br />0.05 m <br /> (22 cm220 mm <br />0.22 m <br />) +
oblong-obovate +, oblongelliptic +  and lanceolate +
1.5cm;7cm +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
5mm +  and 17mm +
Man. +, N.B. +, Nfld. and Labr. (Nfld.) +, N.S. +, Ont. +, P.E.I. +, Que. +, Conn. +, Ga. +, Ill. +, Ind. +, Iowa +, Ky. +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Tenn. +, Vt. +, Va. +, W.Va. +  and Wis. +
0–2000 m +
3-merous +, sessile +  and pedicellate +
white +, lavender +  and rose-purple +
ellipsoid;cylindric +
Alluvial and swamp forests, stream banks, riparian meadows, moist and seeping slopes, marshes, roadside banks, ditches, old fields +
lateral +  and terminal +
spreading +  and reflexed to somewhat +
petiolate +, sessile +  and simple +
2 (?) +  and 5 (?) +
reduced +
porrect +  and descending to somewhat +
3-lobed +
larger +
dentate-lacerate +  and sparsely fringed +
differing in form and color +
slender +  and stout +
0.9 cm9 mm <br />0.009 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1-many-flowered +  and cymose +
pendent +  and erect +
Flowering Jun–Aug(–Sep). +
Gen. Sp. Orchid. Pl., +
aerial +  and subterranean +
lancefusiform +
slender +
downward +  and directed +
minute +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
slenderly cylindric +  and slightly clavate +
1.2 cm12 mm <br />0.012 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
leafless +  and leafy +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Habenaria psycodes +
Platanthera psycodes +
Platanthera +
species +
suborbiculate +  and broadly elliptic +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +
erect to somewhat +