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Trilisa Cassini. Tribe: Eupatorieae. Subtribe: Liatrinae. Trilisa.

Key to Trilisa

A genus of 3 species, perennial herbs, endemic to the Southeastern Coastal Plain of North America. The genus name is an anagram of Liatris, as is Litrisa. Schilling (2011b) showed that Trilisa and Litrisa should be separated from Carphephorus, unless an alternate solution is pursued of either additional splitting, or lumping Liatris, Carphephorus, Litrisa, and Trilisa.

ID notes: Trilisa can be distinguished from Carphephorus by its smaller heads (involucres 3.5-6 mm high vs. 6-15 mm high), fewer phyllaries per head (6-12 vs. 15-40), and lack of shining resin dots on the leaves (Carphephorus has numerous resin dots).

Ref: Bridges & Orzell (2017b) In Weakley et al. (2017); Correa & Wilbur (1969); Cronquist (1980); DeLaney, Bissett, & Weidenhamer (1999); Nesom (2006hh) In Flora of North America Editorial Committee (2006c); Orzell & Bridges (2002); Schilling (2011b); Ward (2022) In Weakley et al. (2022). Show full citations.

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