Platanthera integrilabia |
Platanthera aquilonis |
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monkeyface, white fringeless orchid |
eagle rein orchid, north wind bog-orchid, northern bog orchid, northern green bog orchid, northern green orchid, northern green rein orchid, Sheviak's bog orchid |
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Habit | Plants 50–80 cm. | Plants 5–60 cm. |
Leaves | 2(–3), spreading to ascending, on basal portion of stem, abruptly reduced to bracts distally; blade lanceolate to elliptic, 12–23 × 1–3.2 cm. |
few–several, ascending to arcuate-spreading, scattered along stem, gradually reduced to bracts distally; blade oblong to linear-lanceolate, 2.7–23 × 0.4–4 cm. |
Spikes | rather lax. |
lax to very dense. |
Flowers | resupinate, showy, white; lateral sepals reflexed; petals oblong, margins entire; lip porrect, spatulate to lance-spatulate, without basal thickening, 10–15 × 2.5–4 mm, margins slightly lacerate to subentire; spur slenderly cylindric, scarcely clavate, 35–60 mm; rostellum lobes directed forward, spreading, angular; rostellum lobes slenderly curving forward, slightly spreading, angular-elongate, long; pollinaria with stalks curved forward; pollinia remaining enclosed in anther sacs; viscidia orbiculate; ovary slender, ca.16–22 mm. |
resupinate, not showy, yellowish green with dull yellowish lip, or more whitish green under cool conditions; lateral sepals spreading to reflexed; petals rhombic-ovate- to lance-falcate, margins entire; lip descending, projecting, or apex adhering to dorsal sepal and petal apices, rhombic-lanceolate to lanceolate, without basal thickening, 2.5–6 × 1–1.5 mm, base not rounded-dilated, margins entire; spur clavate or sometimes rather cylindric, 2–5 mm, apex usually broadly obtuse; rostellum lobes divergent, directed downward, very small, rounded, obscure; pollinaria straight; pollinia rotating forward and/or fragmenting, loose pollen masses free of anther sacs and trailing downward onto stigma; viscidia orbiculate; ovary rather slender to stout, mostly 5–13 mm. |
2n | = 42. |
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Platanthera integrilabia |
Platanthera aquilonis |
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Phenology | Flowering (Jun–)Jul–Aug. | Flowering May–Aug. |
Habitat | Wet wooded flats, seeping slopes, marshes, sphagnum bogs | Wet meadows, tundra, marshes, fens, stream banks, shores, ditches, seeping slopes, roadsides, borrow pits, mesic deciduous forest slopes |
Elevation | mostly 100–700 m (mostly 300–2300 ft) | 0–2500 m (0–8200 ft) |
Distribution |
AL; GA; KY; MS; NC; SC; TN
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AK; CO; CT; IA; ID; IL; IN; MA; ME; MI; MN; MT; ND; NE; NH; NJ; NM; NY; OH; OR; PA; RI; SD; UT; VT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; ON; PE; QC; SK; YT
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Discussion | Of conservation concern. The description of Platanthera integrilabia is based on a limited sample and is likely too restrictive. Flowers of this species are nocturnally sweet-scented. The vegetative habit is distinctive, with leaves restricted to the base of the stem and a relatively few-flowered inflorescence borne atop a tall bracted scape. In addition to the normal tuberoid, roots often enlarge distally to form bud-bearing tuberoids at a marked distance from the parent stem, giving rise to diffuse clonal colonies. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Flowers of Platanthera aquilonis are usually scentless, but in the far northwest they have a sweet, pungent scent, like that of some related species. The flowers are commonly self-pollinating: the pollinia rotate forward and downward, contacting the stigma, and/or the pollen masses dissociate and are deposited on the stigma as if they had sifted downward. Platanthera aquilonis is a North American diploid species long confused with the tetraploid Icelandic P. hyperborea (Linnaeus) Lindley. Flowers of both species autopollinate, although the details of the mechanisms may differ. The two species differ in column structure and lip and viscidium shape. True P. hyperborea is similar to P. huronensis, and the relationship of these two species needs further study. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 26, p. 568. | FNA vol. 26, p. 560. |
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera |
Sibling taxa | ||
Synonyms | Habenaria blephariglottis var. integrilabia, Habenaria correlliana | |
Name authority | (Correll) Luer: Native Orchids U.S. & Canada, 186. (1975) | Sheviak: Lindleyana 14: 193, figs. 1–5. (1999) |
Web links |
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