Platanthera huronensis
Platanthera integra
great lakes rein orchid, green bog orchid, Huron green orchid, Lake Huron bog green orchid, northern green bog-orchid
yellow fringeless orchid
few–several, ascending, scattered along stem, gradually reduced to bracts distally;
blade oblong to linear-lanceolate, 5–30 × 0.6–7 cm.
1–3, ascending to spreading, rather abruptly or gradually reduced to bracts distally;
blade lance-oblong to linear-lanceolate, 4.5–32 × 1–3 cm.
very lax to very dense.
dense.
resupinate, not showy but sometimes conspicuous, whitish green;
corolla often whiter than calyx;
lateral sepals spreading to slightly reflexed;
petals ovate- to lance-falcate, margins entire;
lip descending or apex adhering to dorsal sepal and petal apices, lanceolate to nearly linear, without basal thickening, 5–12 × 2–4 mm, base slightly to rather markedly rounded-dilated, margins entire;
spur slenderly cylindric to clavate, 4–12 mm, apex usually slenderly tapered;
rostellum lobes divergent, directed downward, very small, obscure, rounded;
pollinaria straight;
pollinia remaining enclosed in anther sacs;
viscidia oblong;
ovary rather slender to stout, mostly 6–15 mm.
resupinate, showy, pale yellow-orange to pale orange;
dorsal sepal entire or rarely apically dentate;
lateral sepals spreading;
petals elliptic to linear-oblong, margins entire;
lip descending, ovate-elliptic to obovate or oblong, 3–5 × 1.5–4 mm, margins eroded to lacerate or rarely entire, with basal pair of fleshy ridges on adaxial surface;
spur tapering from broad base to slender tube, 5–10 mm;
rostellum lobes curved downward, short, rounded;
pollinaria essentially straight; large pollinia protruding forward;
viscidia orbiculate to suborbiculate;
ovary slender to somewhat stout, 5–11 mm.
= 84.
Platanthera huronensis
Platanthera integra
Northwestern plants commonly treated as Platanthera hyperborea var. viridiflora (Chamisso) Kitamura (note Kitamura’s priority over Luer) are P. huronensis; Chamisso’s name furthermore is synonymous with P. stricta. Aleutian and coastal Alaskan plants are often short, stout, and broad-leaved, and they have incorrectly been referred to 9. P. convallariifolia.
Platanthera huronensis as here delimited does not auto-pollinate in the manner of P. aquilonis. Occasional plants and populations that may be referable to P. huronensis, however, exhibit the movement of pollinia typical of P. aquilonis. These plants might reflect infraspecific variation within an allotetraploid species, result from hybridization, or constitute a distinct taxon. The relationship of some of these plants to P. hyperborea needs study.
Platanthera huronensis is typically intensely fragrant with the sweet, pungent scent of some related species.
Platanthera huronensis is known to hybridize with P. dilatata; it may hybridize with other species as well. Although hybrids of P. dilatata and P. aquilonis may occur, the name traditionally used for them, P. ×media (Rydberg) Luer is a synonym of P. huronensis. See notes under 10. P. aquilonis and 8. P. hyperborea.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
As in Platanthera clavellata and P. nivea, the column of P. integra bears two pairs of lateral processes. In P. integra, the distal structures are essentially sessile and cushionlike, as in P. nivea, but the proximal are short, stout, clublike, and bear several stout horns. The tuberoids of P. integra are abruptly swollen into oblong-cylinders, somewhat like those of P. nivea. These three species evidently form a group apart from Platanthera. See note under 30. P. nivea.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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