Flora of North America species comparison

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Platanthera chorisiana

Chamisso's rein orchid, chimissso's orchid, Choriso bog orchid, Choriso's orchid, small bog orchid
Habit Plants 4–20(–30) 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.
Spikes

rather lax to 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.
2n

= 42.

Platanthera chorisiana
Phenology Flowering Jul–Aug.
Habitat Wet tundra, meadows, bogs
Elevation 0–400 m (0–1300 ft)
Distribution
from FNA
AK; WA; BC; Asia (Kamchatka to Japan)
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 26, p. 563.
Parent taxa Orchidaceae > subfam. Orchidoideae > tribe Orchideae > subtribe Orchidinae > Platanthera
Sibling taxa
P. aquilonis, P. blephariglottis, P. brevifolia, P. chapmanii, P. ciliaris, P. clavellata, P. convallariifolia, P. cristata, P. dilatata, P. flava, P. grandiflora, P. hookeri, P. huronensis, P. hyperborea, P. integra, P. integrilabia, P. lacera, P. leucophaea, P. limosa, P. macrophylla, P. nivea, P. obtusata, P. orbiculata, P. peramoena, P. praeclara, P. psycodes, P. purpurascens, P. sparsiflora, P. stricta, P. tipuloides, P. zothecina
Synonyms Habenaria chorisiana, Limnorchis chorisiana, Pseudodiphryllum chorisianum
Name authority (Chamisso) Reichenbach f.: in H. G. L. Reichenbach et al., Icon. Fl. Germ. Helv. 13–14: 128. (1851)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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