Platanthera flava |
Platanthera macrophylla |
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northern tubercled bog-orchid, palegreen orchid |
greater roundleaf orchid, large round-leaf orchid, large-leaf bog-orchid |
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Habit | Plants 13–65 cm. | Plants 23–63 cm. | ||||
Leaves | (1–)2–3(–4), spreading to ascending, gradually to rather abruptly reduced to bracts distally; blade lanceolate to elliptic-oblong, 5–35 × 1–7 cm. |
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 to dense. |
lax. |
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Flowers | resupinate, inconspicuous, yellowish green; lateral sepals porrect to reflexed; petals oblong-orbiculate to ovate, apex somewhat crenulate; lip descending to commonly reflexed, 2–6 × 1.8–5 mm, base auriculate, with prominent central tubercle, distal margin entire to slightly crenulate; spur cylindric to strongly clavate, 4–8(–11) mm, apex rarely 2-lobed; rostellum lobes mostly parallel to slightly diverging, directed downward, minute, obscure; pollinia remaining enclosed in anther sacs; viscidia mostly quadrangular, oblong-quadrangular, orbiculate, or broadly asymmetric, commonly canaliculate to nearly cylindric and difficult to assess; ovary rather slender to stout, mostly 8–10 × 2 mm. |
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 flava |
Platanthera macrophylla |
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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 |
e North America
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CT; MA; ME; MI; MN; NH; NY; PA; VT; NB; NL; NS; ON; PE; QC
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26, p. 563. | FNA vol. 26. | ||||
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Orchis flava, Habenaria flava, Perularia scutellata | Habenaria macrophylla, P. orbiculata var. macrophylla | ||||
Name authority | (Linnaeus) Lindley: Gen. Sp. Orchid. Pl., 293. (1835) | (Goldie) P. M. Brown: Wild Fl. Notes 3: 23. (1988) | ||||
Web links |