Heterotheca canescens (DC.) Shinners has silvery green leaves due to the high density of hairs. The species is mostly diploid (2n=18) with tetraploids (2n=36) occurring in the central part of the range. See Semple (2006 FNA).

Last revised 21 April 2025 by J.C. Semple
© 2025 J.C. Semple, including all photographs unless otherwise indicated
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1-2. Heterotheca canescens. 1. Habit and habitat, Semple 2196, Burnett Co., Texas 2. Large plants, Sermple & Brouillet 3334, Hays Co. Texas. 3. Inflorescence branchs and heads, S 3334. 4. Upper stem leaves and head, Semple & Brammall 2728, Barber Co. Kansas.