Tinantia Scheidweiler.
A genus of about 14 species, annual (less typically perennial) herbs, of TX south through tropical America.
ID notes:Tinantia resembles the more common and widespread Commelina in having bilateral flowers, with 2 large petals (lavender blue) and 1 smaller petal (white). The flowers emerge from an open spathe (similar to the leaves, but with a cordate base). Only Commelina is similar in these features; it differs in having a folded spathe, 3 rather then 6 fertile stamens, and the filaments being glabrous rather than bearded with hairs.
Ref: Faden (2000b) In Flora of North America Editorial Committee (2000). Show full citations.
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