Platanthera macrophylla |
Orchidaceae tribe Orchideae |
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greater roundleaf orchid, large round-leaf orchid, large-leaf bog-orchid |
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Habit | Plants 23–63 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. |
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Spikes | lax. |
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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. |
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Platanthera macrophylla |
Orchidaceae tribe Orchideae |
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Phenology | Flowering Jun–Aug. | |
Habitat | Mesic to wet coniferous and deciduous forest | |
Elevation | mostly 0–1000 m (mostly 0–3300 ft) | |
Distribution |
CT; MA; ME; MI; MN; NH; NY; PA; VT; NB; NL; NS; ON; PE; QC
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Source | FNA vol. 26. | FNA vol. 26. |
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | Orchidaceae > subfam. Orchidoideae |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Habenaria macrophylla, P. orbiculata var. macrophylla | |
Name authority | (Goldie) P. M. Brown: Wild Fl. Notes 3: 23. (1988) | unknown |
Web links |