Flora of the Southeastern United States
2022 Edition

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ORCHIDACEAE

Spiranthes triloba (Small) K. Schumann. Panther Ladies'-tresses. Phen: Late Oct-early Feb (-May). Hab: Pine flatwoods and calcareous Florida prairies. Dist: FL Panhandle south to s. FL, primarily along the west coast of the peninsula. Restricted to FL.

ID notes: Spiranthes triloba is distinct from S. odorata in having slender stoloniferous roots, small linear-lanceolate to oblanceolate leaves, small fragrant flowers 5-8 mm long, a densely papillate lip, and lateral sepals held slightly angled above the flower. It also tends to occur in frequently burned calcareous prairies and open flatwoods compared to the flooded forests and cypress domes of S. odorata (Pace and Cameron 2016).

Origin/Endemic status: Endemic

Syn: = K4, Pace & Cameron (2016); < Ibidium cernuum – S

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