Platanthera psycodes
Platanthera grandiflora
lesser purple fringe bog-orchid, lesser purple fringe orchid, small purple-fringe orchid
greater purple fringe bog-orchid, greater purple fringe orchid
2–5, wide-spreading, recurved to somewhat ascending, scattered along stem, gradually reduced to bracts distally;
blade lanceolate, oblong-elliptic, or oblong-obovate, 5–22 × 1.5–7 cm.
2–6, wide-spreading and recurved to somewhat ascending, scattered along stem, gradually reduced to bracts distally;
blade lanceolate, elliptic, oblong-elliptic, or oblong-obovate, 13–24 × 2.5–9 cm.
lax to very dense.
lax to rather dense.
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.
resupinate, showy, lavender- to rose-purple, rarely white;
lateral sepals spreading to somewhat reflexed;
petals ovate, oblong, elliptic-oblong, or oblong-obovate, margins crenate to dentate-lacerate, sometimes nearly entire;
lip descending to somewhat porrect, deeply 3-lobed, without basal thickening, 10–25 × 14–26 mm, distal margins of lobes fringed, usually deeply, lateral lobes sometimes perpendicular to middle lobe, lateral lobes cuneate, often broadly so, middle lobe broadly cuneate-flabellate, often emarginate to 2-fid;
spur clavate, 15–35 mm;
rostellum lobes directed forward, spreading, angular;
pollinaria nearly straight;
pollinia remaining enclosed in anther sacs;
viscidia orbiculate;
ovary slender to stout, 12–25 mm.
= 42.
= 42.
Platanthera psycodes
Platanthera grandiflora
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Platanthera grandiflora is known to hybridize with P. lacera in the northeasternmost portion of its range, where the species bloom simultaneously. The name P. ×keenanii P. M. Brown has recently been proposed for these hybrids, but the complex synonymy of this group dictates that types be checked for possible priority. See the discussion under P. lacera. A few specimens also suggest very rare hybridization with P. psycodes (W. P. Stoutamire 1974).
Rare white-flowered plants may be separated from 23. Platanthera leucophaea by the orientation of the pollinia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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