Platanthera macrophylla |
Platanthera integra |
|
---|---|---|
greater roundleaf orchid, large round-leaf orchid, large-leaf bog-orchid |
yellow fringeless orchid |
|
Habit | Plants 23–63 cm. | Plants 20–75 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. |
1–3, ascending to spreading, rather abruptly or gradually reduced to bracts distally; blade lance-oblong to linear-lanceolate, 4.5–32 × 1–3 cm. |
Spikes | lax. |
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, pale yellow-orange to pale orange; dorsal sepal entire or rarely apically dentate; lateral sepals spreading; petals elliptic to linear-oblong, margins entire; lip descending, ovate-elliptic to obovate or oblong, 3–5 × 1.5–4 mm, margins eroded to lacerate or rarely entire, with basal pair of fleshy ridges on adaxial surface; spur tapering from broad base to slender tube, 5–10 mm; rostellum lobes curved downward, short, rounded; pollinaria essentially straight; large pollinia protruding forward; viscidia orbiculate to suborbiculate; ovary slender to somewhat stout, 5–11 mm. |
Platanthera macrophylla |
Platanthera integra |
|
Phenology | Flowering Jun–Aug. | Flowering Jul–Sep. |
Habitat | Mesic to wet coniferous and deciduous forest | Wet pine barrens, peaty depressions in pine savannas, wet sandy woods |
Elevation | mostly 0–1000 m (mostly 0–3300 ft) | 0–900 m (0–3000 ft) |
Distribution |
CT; MA; ME; MI; MN; NH; NY; PA; VT; NB; NL; NS; ON; PE; QC
|
AL; DE; FL; GA; LA; MS; NC; NJ; SC; TN; TX
|
Discussion | As in Platanthera clavellata and P. nivea, the column of P. integra bears two pairs of lateral processes. In P. integra, the distal structures are essentially sessile and cushionlike, as in P. nivea, but the proximal are short, stout, clublike, and bear several stout horns. The tuberoids of P. integra are abruptly swollen into oblong-cylinders, somewhat like those of P. nivea. These three species evidently form a group apart from Platanthera. See note under 30. P. nivea. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26. | FNA vol. 26, p. 571. |
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 integra, Habenaria integra |
Name authority | (Goldie) P. M. Brown: Wild Fl. Notes 3: 23. (1988) | (Nuttall) A. Gray ex L. C. Beck: Bot. North. Middle States ed. 2, 348. (1848) |
Web links |