Difference between revisions of "Spiranthes torta"
in R. A. Howard, Fl. Less. Antill. 1: 77. 1974.
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|name=Ophrys torta | |name=Ophrys torta | ||
|authority=Thunberg | |authority=Thunberg | ||
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| + | |publication_title=Mus. Nat. Acad. Upsal. | ||
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|synonyms={{Treatment/ID/Synonym | |synonyms={{Treatment/ID/Synonym | ||
|name=Ibidium tortile | |name=Ibidium tortile | ||
|authority=(Swartz) House | |authority=(Swartz) House | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Spiranthes tortilis | |name=Spiranthes tortilis | ||
|authority=(Swartz) Richard | |authority=(Swartz) Richard | ||
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|hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Cranichideae;Orchidaceae (tribe Cranichideae) subtribe Spiranthinae;Spiranthes;Spiranthes torta | |hierarchy=Orchidaceae;Orchidaceae subfam. Orchidoideae;Orchidaceae tribe Cranichideae;Orchidaceae (tribe Cranichideae) subtribe Spiranthinae;Spiranthes;Spiranthes torta | ||
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name=Spiranthes torta | name=Spiranthes torta | ||
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|authority=(Thunberg) Garay & H. R. Sweet | |authority=(Thunberg) Garay & H. R. Sweet | ||
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|subfamily=Orchidaceae subfam. Orchidoideae | |subfamily=Orchidaceae subfam. Orchidoideae | ||
|tribe=Orchidaceae tribe Cranichideae | |tribe=Orchidaceae tribe Cranichideae | ||
Latest revision as of 22:11, 5 November 2020
Plants 7–50 cm. Roots few, spreading to descending, slender to somewhat tuberous, mostly to 1 cm diam. Leaves fugacious, 2 or 3, basal, reduced to bracts on stem, ascending, narrowly oblanceolate, 5–20 × 0.5 cm. Spikes secund to loosely spiraled, 8–10 flowers per cycle of spiral; rachis sparsely pubescent, some trichomes capitate, glands obviously stalked. Flowers nodding, white; sepals elliptic, 5 × 1 mm; lateral sepals distinct to base, curving slightly downward, oblique; petals green at base, oblique, elliptic, 5 × 1.5 mm; lip green with white apex, ovate, 4 × 2 mm; veins parallel; basal calli very short, stout, to 0.3 mm; viscidium linear-lanceolate; ovary mostly 3 mm. Seeds monoembryonic.
Phenology: Flowering May–Jul.
Habitat: Dry pinelands
Elevation: 0–10 m
Distribution
Fla., West Indies (Bahamas), Bermuda, Central America.
Discussion
Spiranthes torta is restricted to the rocky pinelands in southern Florida and is easily recognized by its nodding flowers and downward-pointing lateral sepals. It could only be confused with S. tuberosa, typically a much shorter plant with pure white flowers.
Spiranthes amesiana Schlechter is often included as a synonym of S. torta; recent studies indicate that it may be a distinct species. It is said to differ from S. torta in its denser inflorescence, spade-shaped lip with a crenulate-ciliate margin, and densely pubescent basal calli. Within the area covered by the flora, it is restricted to extreme southern Florida; it also has been collected in the Bahamas and Nicaragua.
Selected References
None.