Spiranthes porrifolia |
Spiranthes lacera |
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creamy ladies' tresses, creamy lady's tresses, western ladies'-tresses |
northern slender ladies' tresses, northern slender lady's tresses, slender ladies'-tresses |
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Habit | Plants 15–60 cm. | Plants 15–65 cm. | ||||
Roots | few–several, spreading to descending, tuberous, mostly to 1 cm diam. |
few–several, spreading to descending, mostly to 0.75 cm diam., slender to stout. |
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Leaves | persisting through anthesis or fugaceous, basal, often on proximal portion of stem, ascending, linear to linear-lanceolate, linear-oblanceolate, oblanceolate or elliptic, to 34 × 3.5 cm. |
, basal, spreading, obovate, 2–5 × 1–2 cm. |
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Spikes | usually very tightly spiraled, rarely loosely spiraled, usually 3 flowers per cycle of spiral; rachis glabrous to sparsely pubescent, trichomes less (usually much less) than 0.18 mm, capitate glands often sessile. |
secund to tightly spiraled, 8–10 flowers per cycle of spiral; rachis glabrous to sparsely pubescent, trichomes capitate to clavate, glands obviously stalked. |
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Flowers | ascending, creamy to markedly yellowish, slenderly tubular; sepals connate at base, 4.6–11 mm, apex reflexed-spreading; petals linear-lanceolate to linear-oblanceolate, apex reflexed-spreading, obtuse to subacute or subemarginate; lip lance-ovate to lanceolate, 4–9.5 × 1.9–4.3 mm, apex recurved less than to scarcely more than apices of sepals and petals, only slightly or not at all dilated, with subapical dense cushion of peg-shaped trichomes on adaxial surface; veins few to several, branches wide-spreading or often parallel; viscidia linear to linear-elliptic; ovary mostly 2–7.5 mm. |
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. |
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Seeds | monoembryonic. |
monoembryonic. |
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2n | = 44 [66]. |
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Spiranthes porrifolia |
Spiranthes lacera |
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Phenology | Flowering May–Aug. | |||||
Habitat | Moist to wet riparian meadows, stream banks, marshes, fens, seeping banks | |||||
Elevation | 100–2600 m (300–8500 ft) | |||||
Distribution |
CA; ID; NV; OR; WA
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e North America
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Discussion | Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 26. | FNA vol. 26, p. 536. | ||||
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Cranichideae > subtribe Spiranthinae > Spiranthes | Orchidaceae > subfam. Orchidoideae > tribe Cranichideae > subtribe Spiranthinae > Spiranthes | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | S. romanzoffiana var. porrifolia | Neottia lacera | ||||
Name authority | Lindley: Gen. Sp. Orchid. Pl., 467. (1840) | (Rafinesque) Rafinesque: Herb. Raf., 44. (1833) | ||||
Web links |