Platanthera macrophylla |
Platanthera peramoena |
|
---|---|---|
greater roundleaf orchid, large round-leaf orchid, large-leaf bog-orchid |
purple fringeless orchid |
|
Habit | Plants 23–63 cm. | Plants 35–105 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. |
2–5, spreading to ascending, scattered along stem, gradually reduced to bracts distally; blade lanceolate, elliptic, oblong-elliptic, or oblance-oblong, 7–27 × 1.2–5 cm. |
Spikes | lax. |
lax to 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, rose-purple; lateral sepals somewhat reflexed; petals oblong-linear to spatulate, distally crenate to entire; lip descending to somewhat porrect, deeply 3-lobed, without basal thickening, 11–20 × 12–23 mm, distal margins of lobes dentate-lacerate, rarely nearly entire, lateral lobes narrowly cuneate, middle lobe broadly cuneate-flabellate, emarginate to 2-fid; spur clavate, 20–30 mm; rostellum lobes directed forward, spreading, angular; pollinaria straight to geniculate; pollinia directed forward; viscidia orbiculate; ovary slender, 13–23 mm. |
Platanthera macrophylla |
Platanthera peramoena |
|
Phenology | Flowering Jun–Aug. | Flowering (Jun–)Jul–Aug(–Oct). |
Habitat | Mesic to wet coniferous and deciduous forest | Alluvial forests, wet wooded flats, stream banks, seeping slopes, marshes, moist prairies, old fields and pastures, ditches, thickets |
Elevation | mostly 0–1000 m (mostly 0–3300 ft) | 0–800 m (0–2600 ft) |
Distribution |
CT; MA; ME; MI; MN; NH; NY; PA; VT; NB; NL; NS; ON; PE; QC
|
AL; AR; DE; GA; IL; IN; KY; MD; MO; MS; NC; NJ; OH; PA; SC; TN; VA; WV
|
Source | FNA vol. 26. | FNA vol. 26, p. 565. |
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 | Habenaria peramoena |
Name authority | (Goldie) P. M. Brown: Wild Fl. Notes 3: 23. (1988) | (A. Gray) A. Gray: Manual, 473. (1848) |
Web links |