Difference between revisions of "Spiranthes lacera"

(Rafinesque) Rafinesque

Herb. Raf., 44. 1833.

IllustratedEndemic
Basionym: Neottia lacera Rafinesque Amer. Monthly Mag. & Crit. Rev. 2: 206. 1818
Treatment appears in FNA Volume 26. Treatment on page 536. Mentioned on page 533, 535.
FNA>Volume Importer
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|subfamily=Orchidaceae subfam. Orchidoideae
 
|subfamily=Orchidaceae subfam. Orchidoideae
 
|tribe=Orchidaceae tribe Cranichideae
 
|tribe=Orchidaceae tribe Cranichideae

Latest revision as of 21:11, 5 November 2020

Plants 15–65 cm. Roots few–several, spreading to descending, mostly to 0.75 cm diam., slender to stout. Leaves, basal, spreading, obovate, 2–5 × 1–2 cm. Spikes secund to tightly spiraled, 8–10 flowers per cycle of spiral; rachis glabrous to sparsely pubescent, trichomes capitate to clavate, glands obviously stalked. Flowers white; sepals somewhat spreading, distinct to base, elliptic, 5 × 1 mm; lateral sepals white throughout, apex acuminate; petals lanceolate, slightly oblique, 5 × 1 mm; lip white with green or yellowish green center, ovate to oblong, 5 × 2.5 mm, apex dilated, its margin crisped-crenate, pubescent; veins obscure; basal calli erect, short-pointed, mostly to 1 mm; viscidium linear-lanceolate; ovary mostly 3 mm. Seeds monoembryonic.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Flowers laxly arranged on spike (ratio of spike length/flower number equal to or greater than 2.3); inflorescence capitate-pubescent; leaves usually persisting through anthesis. Spiranthes lacera var. lacera
1 Flowers densely arranged on spike (ratio of spike length/flower number less than 2.3); entire plant essentially glabrous; leaves usually absent at anthesis. Spiranthes lacera var. gracilis