Spiranthes porrifolia |
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creamy ladies' tresses, creamy lady's tresses, western ladies'-tresses |
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Habit | Plants 15–60 cm. |
Roots | few–several, spreading to descending, tuberous, mostly to 1 cm diam. |
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. |
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. |
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. |
Seeds | monoembryonic. |
2n | = 44 [66]. |
Spiranthes porrifolia |
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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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Source | FNA vol. 26. |
Parent taxa | Orchidaceae > subfam. Orchidoideae > tribe Cranichideae > subtribe Spiranthinae > Spiranthes |
Sibling taxa | |
Synonyms | S. romanzoffiana var. porrifolia |
Name authority | Lindley: Gen. Sp. Orchid. Pl., 467. (1840) |
Web links |