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(Vol. 06, 2003-12) Taxonomy of Tetraneuris (Asteraceae: Helenieae: Tetraneurinae)
Tetraneuris is recognized as a genus separate from Hymenoxys and a taxonomic treatment is presented for the 14 taxa recognized as constituting Tetraneuris: T. acaulis var. acaulis, T. acaulis var. arizonica, T. acaulis ...