Platanthera macrophylla |
Platanthera ciliaris |
|
---|---|---|
greater roundleaf orchid, large round-leaf orchid, large-leaf bog-orchid |
orange fringe bog-orchid, yellow fringe orchid |
|
Habit | Plants 23–63 cm. | Plants 24–100 cm. |
Leaves | 2, in subequal basal pair lying on ground; bracts (very rarely, 0–)1–6, scattered along stem; blade broadly elliptic, orbiculate, or oblate, 7–24 × 5–19 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. |
Spikes | lax. |
rather dense. |
Flowers | resupinate, rather showy; calyx mostly greenish white; corolla mostly white; lateral sepals reflexed to somewhat spreading; petals lanceolate-falcate, margins entire; lip descending to somewhat reflexed, linear-oblong to linear-lanceolate, without basal thickening, 10–23 × 1–2.5 mm, margins entire; spur slenderly clavate, 28–46 mm; rostellum lobes directed strongly forward, wide-spreading, angular; pollinaria nearly straight, (4.6–)4.7–6.8 mm; pollinia remaining enclosed in anther sacs; viscidia orbiculate; ovary slender to rather stout, mostly 16–29 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. |
Platanthera macrophylla |
Platanthera ciliaris |
|
Phenology | Flowering Jun–Aug. | Flowering (Jun–)Jul–Sep. |
Habitat | Mesic to wet coniferous and deciduous forest | Moist sandy and peaty meadows, marshes, prairies, pine savannas, open woods, wet wooded flats, seeping slopes, roadsides, dry wooded slopes, sphagnum bogs |
Elevation | mostly 0–1000 m (mostly 0–3300 ft) | 0–1700 m (0–5600 ft) |
Distribution |
CT; MA; ME; MI; MN; NH; NY; PA; VT; NB; NL; NS; ON; PE; QC
|
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
|
Discussion | 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.) |
|
Source | FNA vol. 26. | 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 | ||
Synonyms | Habenaria macrophylla, P. orbiculata var. macrophylla | Orchis ciliaris, Habenaria ciliaris |
Name authority | (Goldie) P. M. Brown: Wild Fl. Notes 3: 23. (1988) | (Linnaeus) Lindley: Gen. Sp. Orchid. Pl., 292. (1835) |
Web links |