Platanthera chorisiana

(Chamisso) Reichenbach f. in H. G. L. Reichenbach et al.

in H. G. L. Reichenbach et al., Icon. Fl. Germ. Helv. 13–14: 128. 1851.

Basionym: Habenaria chorisiana Chamisso Linnaea 3: 31. 1828
Synonyms: Limnorchis chorisiana (Chamisso) J. P. Anderson Pseudodiphryllum chorisianum (Chamisso) Nevski
Treatment appears in FNA Volume 26. Treatment on page 563. Mentioned on page 553.

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.


Phenology: Flowering Jul–Aug.
Habitat: Wet tundra, meadows, bogs
Elevation: 0–400 m

Distribution

V26 1147-distribution-map.jpg

B.C., Alaska, Wash., Asia (Kamchatka to Japan)

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Platanthera chorisiana"
self-pollination +
Charles J. Sheviak +
(Chamisso) Reichenbach f. in H. G. L. Reichenbach et al. +
Habenaria chorisiana +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
2 cm20 mm <br />0.02 m <br /> (9 cm90 mm <br />0.09 m <br />) +
lanceolate +  and suborbiculate +
0.9 cm9 mm <br />0.009 m <br /> (4 cm40 mm <br />0.04 m <br />) +
B.C. +, Alaska +, Wash. +  and Asia (Kamchatka to Japan) +
0–400 m +
3-merous +, sessile +  and pedicellate +
inconspicuous +
ellipsoid;cylindric +
Wet tundra, meadows, bogs +
lateral +  and terminal +
petiolate +, sessile +  and simple +
subopposite +
reduced +
projecting +
elliptic +, ovate +, orbiculate +  and concave +
larger +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
entire +  and fringed +
1.2mm +  and 2mm +
differing in form and color +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
1-many-flowered +  and cymose +
pendent +  and erect +
Flowering Jul–Aug. +
in H. G. L. Reichenbach et al., Icon. Fl. Germ. Helv. +
aerial +  and subterranean +
lancefusiform +
slender +
downward +, directed +  and spreading +
minute +
free +, distinct +, adnate +  and connate +
foliaceous +
not +  and alike +
obtuse +, stoutly cylindric +  and saccate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.125 cm1.25 mm <br />0.00125 m <br />) +
leafless +  and leafy +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Limnorchis chorisiana +  and Pseudodiphryllum chorisianum +
Platanthera chorisiana +
Platanthera +
species +
oblong +  and suborbiculate-quadrangular +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +
erect to somewhat +