Platanthera blephariglottis |
Platanthera ciliaris |
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white fringe orchid, white-fringe bog-orchid |
orange fringe bog-orchid, yellow fringe orchid |
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Habit | Plants 8–110 cm. | Plants 24–100 cm. | ||||
Leaves | 2–several, spreading to ascending, scattered along stem, rather abruptly to gradually reduced distally; blade linear-lanceolate, ovate-lanceolate, elliptic-lanceolate, 5–35 × 1–5 cm. |
2–4, spreading to ascending, gradually to somewhat abruptly reduced to bracts distally; blade lanceolate to lance-elliptic, 5–40 × 0.6–6 cm. |
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Spikes | dense to rather lax. |
rather dense. |
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Flowers | resupinate, showy, white; lateral sepals reflexed; petals linear to oblanceolate, apex fringed to nearly entire; lip reflexed to porrect, without basal thickening, ovate-oblong to oblong-elliptic, rarely quadrangular-suborbiculate, margin fringed; spur essentially cylindric, slender; rostellum lobes curving forward, slightly spreading, angular-elongate; pollinaria with stalks curved forward; pollinia remaining enclosed in anther sacs; viscidia elliptic-suborbiculate to orbiculate; ovary slender, 10–28 mm. |
resupinate, showy, orange; dorsal sepal entire or rarely emarginate; lateral sepals reflexed; petals linear to linear-cuneate, margins apically fringed; lip porrect to descending, oblong to broadly ovate-spatulate, without basal thickening, 8–19 × 4–18 mm, margins deeply filiform-fringed; spur slenderly cylindric, rarely slightly clavate, 20–35 mm; rostellum lobes scarcely to markedly curving forward, slightly spreading, angular-elongate; pollinaria with stalks nearly straight to curved forward; pollinia remaining enclosed in anther sacs; viscidia orbiculate; ovary slender, 12–27 mm. |
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Platanthera blephariglottis |
Platanthera ciliaris |
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Phenology | Flowering (Jun–)Jul–Sep. | |||||
Habitat | Moist sandy and peaty meadows, marshes, prairies, pine savannas, open woods, wet wooded flats, seeping slopes, roadsides, dry wooded slopes, sphagnum bogs | |||||
Elevation | 0–1700 m (0–5600 ft) | |||||
Distribution |
e North America
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AL; AR; CT; DC; DE; FL; GA; IL; IN; KY; LA; MA; MD; MI; MO; MS; NC; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; WV; ON
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Selection for longer spurs in response to local pollination pressures on the southeastern Coastal Plain has been documented in Platanthera ciliaris, but the extent of variation is minimal, and the situation does not appear to be comparable to that in P. blephariglottis. Hybrids of Platanthera ciliaris with P. blephariglottis are P. ×bicolor (Rafinesque) Luer and with P. cristata are P. ×channellii Folsom; until recently the latter was confused with P. chapmanii (J. P. Folsom 1984). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 567. | FNA vol. 26, p. 568. | ||||
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Orchis blephariglottis, Habenaria blephariglottis | Orchis ciliaris, Habenaria ciliaris | ||||
Name authority | (Willdenow) Lindley: Gen. Sp. Orchid. Pl., 291. (1835) | (Linnaeus) Lindley: Gen. Sp. Orchid. Pl., 292. (1835) | ||||
Web links |