Platanthera chorisiana |
Platanthera clavellata |
|
---|---|---|
Chamisso's rein orchid, chimissso's orchid, Choriso bog orchid, Choriso's orchid, small bog orchid |
little club-spur bog-orchid, small green wood orchid |
|
Habit | Plants 4–20(–30) cm. | Plants 8–47 cm. |
Leaves | (1–)2(–4), spreading, subopposite toward base of stem; bracts (0–)1(–2) distally; blade elliptic, lanceolate, to suborbiculate, 2–9 × 0.9–4 cm. |
1(–2), on basal half of stem, ascending to spreading, usually abruptly reduced to bracts distally; blade oblanceolate to oblong, linear-oblong, or elliptic, 3–19 × 0.8–3.5 cm. |
Spikes | rather lax to dense. |
moderately dense. |
Flowers | incompletely resupinate, inconspicuous, greenish; lateral sepals porrect; petals broadly ovate, margins entire; lip projecting forward, concave, orbiculate, ovate, or elliptic, without basal thickening, 1.5–2.5 × 1.2–2 mm, margins entire; spur stoutly cylindric to saccate, obtuse, 0.7–1.25 mm; rostellum lobes spreading, directed downward, minute, obscure; pollinaria straight; pollinia evidently remaining enclosed in anther sacs; viscidia oblong to suborbiculate-quadrangular; ovary rather stout, mostly 2–4 mm. |
resupinate, often incompletely so and held at angle, not showy, rather inconspicuous pale green to dull yellowish green; lateral sepals porrect; petals ovate to obovate; lip oblong, obscurely 3-lobed, without basal thickening, 3–7 × 3–4 mm, margins sometimes dentate-lacerate, apex truncate; spur clavate, 7–13 mm; rostellum lobes directed downward, very short, truncate; pollinaria straight or slightly curved laterally; pollinia fragmenting, pollen masses trailing down onto stigma; viscidia linear to linear lanceolate; ovary rather stout, 6–11 mm. |
2n | = 42. |
= 42. |
Platanthera chorisiana |
Platanthera clavellata |
|
Phenology | Flowering Jul–Aug. | Flowering summer (Jun–Aug). |
Habitat | Wet tundra, meadows, bogs | Sphagnum bogs, sphagnous seeps and meadows, wet sandy and peaty meadows, marshes, low woods, wet prairies, and roadsides |
Elevation | 0–400 m (0–1300 ft) | 0–2000 m (0–6600 ft) |
Distribution |
AK; WA; BC; Asia (Kamchatka to Japan)
|
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KY; LA; MA; MD; ME; MI; MN; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NB; NF; NS; ON; PE; QC
|
Discussion | In common with Platanthera nivea and P. integra, the column of P. clavellata bears a series of lateral projections that are directed forward; the upper pair is elaborately adorned and may be glandular. It appears that this species is inappropriately placed in Platanthera. See note under 30. P. nivea. The broader leaves cited as distinguishing Platanthera clavellata var. ophioglossoides are more prevalent in the North, but occur throughout the range of the species. In some areas populations commonly display a complete range of leaf shape; this feature alone is of no taxonomic significance. The unusual and infrequent hybrid Platanthera blephariglottis × P. clavellata is P. ×vossii Case. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26, p. 563. | FNA vol. 26, p. 570. |
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera | Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera |
Sibling taxa | ||
Synonyms | Habenaria chorisiana, Limnorchis chorisiana, Pseudodiphryllum chorisianum | Orchis clavellata, Habenaria clavellata, Habenaria clavellata var. ophioglossoides |
Name authority | (Chamisso) Reichenbach f.: in H. G. L. Reichenbach et al., Icon. Fl. Germ. Helv. 13–14: 128. (1851) | (Michaux) Luer: Native Orchids Florida, 148. (1972) |
Web links |