Difference between revisions of "Platanthera leucophaea"

(Nuttall) Lindley

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

Basionym: Orchis leucophaea Nuttall Trans. Amer. Philos. Soc., n. s. 5: 161. 1834
Synonyms: Habenaria leucophaea (Nuttall) A. Gray
Treatment appears in FNA Volume 26. Treatment on page 566. Mentioned on page 552, 564, 565.
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|subfamily=Orchidaceae subfam. Orchidoideae
 
|subfamily=Orchidaceae subfam. Orchidoideae
 
|tribe=Orchidaceae tribe Orchideae
 
|tribe=Orchidaceae tribe Orchideae

Revision as of 19:29, 24 September 2019

Plants 32–112 cm. Leaves several to many, ascending, scattered along stem, imperceptibly reduced to bracts distally; blade lanceolate to ovate-lanceolate, usually to 20 × 4 cm. Spikes lax to moderately dense. Flowers resupinate, showy, corolla white, calyx green to whitish green; lateral sepals porrect; petals obovate to rarely flabellate, apically lacerate; lip descending to horizontally projecting, deeply 3-lobed, without basal thickening, 14–22 × 15–29 mm, distal margins of lobes deeply incised, fringed, lateral lobes flabellate, usually broad, overlapping middle lobe, middle lobe flabellate, sometimes very broadly, emarginate; spur slenderly clavate, 28–47 mm; rostellum lobes nearly parallel, directed downward, short, rounded; pollinaria geniculate; pollinia directed forward (column appearing hooded), remaining enclosed in anther sacs; viscidia orbiculate; ovary slender, mostly 15–30 mm. 2n = 42.


Phenology: Flowering Jun–Aug.
Habitat: Mesic to wet prairies, marshes, fens, lake shores, old fields
Elevation: 80–300 m

Distribution

V26 1155-distribution-map.jpg

Ont., Ill., Ind., Iowa, La., Maine, Mich., Mo., Nebr., N.J., N.Y., Ohio, Okla., Va., Wis.

Discussion

Of conservation concern.

A very rare hybrid with Platanthera psycodes, known only from Ontario, is P. ×reznicekii Catling, Brownell & G. Allen.

See the discussion under 22. Plantanthera praeclara.

Selected References

None.

Lower Taxa

None.
... more about "Platanthera leucophaea"
Charles J. Sheviak +
(Nuttall) Lindley +
Orchis leucophaea +
Ont. +, Ill. +, Ind. +, Iowa +, La. +, Maine +, Mich. +, Mo. +, Nebr. +, N.J. +, N.Y. +, Ohio +, Okla. +, Va. +  and Wis. +
80–300 m +
Mesic to wet prairies, marshes, fens, lake shores, old fields +
Flowering Jun–Aug. +
Gen. Sp. Orchid. Pl., +
Habenaria leucophaea +
Platanthera leucophaea +
Platanthera +
species +