Platanthera integrilabia |
Platanthera purpurascens |
|
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monkeyface, white fringeless orchid |
purple-petal bog orchid |
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Habit | Plants 50–80 cm. | Plants 24–80 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, abruptly diverging or sometimes ascending, scattered along stem; blade oblong to ovate or lanceolate, 5.5–16(–28) × 1–4.5 cm. |
Spikes | rather lax. |
very lax to dense, flowers sometimes irregularly grouped in fascicles. |
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, green to yellowish green, often suffused with blue or lip sometimes with red; lateral sepals spreading to reflexed; petals ovate- to lance-falcate, margins entire; lip descending to somewhat reflexed or projecting, lanceolate to ovate, sometimes with prominent suborbiculate basal dilation, without basal thickening, 4–8 × 1.5–3 mm; spur strongly clavate to scrotiform, 2–3 mm, apex obtuse; rostellum lobes strongly diverging, very small, rounded, obscure; pollinaria straight; pollinia remaining enclosed in anther sacs; viscidia orbiculate to oblong; ovary rather slender to stout, mostly 5–9 mm. |
2n | = 42 [63]. |
|
Platanthera integrilabia |
Platanthera purpurascens |
|
Phenology | Flowering (Jun–)Jul–Aug. | Flowering Jul–Aug. |
Habitat | Wet wooded flats, seeping slopes, marshes, sphagnum bogs | Stream banks, shores, ditches, fens, seeping slopes, roadsides, commonly in thickets, open woods |
Elevation | mostly 100–700 m (mostly 300–2300 ft) | 2500–3300 m (8200–10800 ft) |
Distribution |
AL; GA; KY; MS; NC; SC; TN
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AZ; CA; CO; NM; WY
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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 purpurascens are strongly semen scented, and their musty scent is markedly different than the sweet and spicy scents of other fragrant species. In some areas this species hybridizes with Platanthera dilatata var. albiflora, producing sweetly fragant plants with lanceolate green lips. At the southern edge of its range, however, it often occurs with similar plants in the absence of another putative parent. The identity of these plants is uncertain. Their rather generalized morphology might mask polyphyletic origins. (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 | Limnorchis purpurascens, P. hyperborea var. purpurascens |
Name authority | (Correll) Luer: Native Orchids U.S. & Canada, 186. (1975) | (Rydberg) Sheviak & W. F. Jennings: N. Amer. Native Orchid J. 3: 445. (1997) |
Web links |