Roughleaf Aster
Eurybia radulina (A. Gray) G.L. Nesom is native to dry rock outcrops, edges of forests, open forests, mostly on slopes, foothill oak woodlands, oak, oak-fir, yellow pine forests of the Cascades and Coastal Ranges from southwestern British Columbia to California and in the Sierra Nevada in California (Brouillet 2006 FNA). The species is distinguished by the following combination of traits: plants clumped, laxly caespitose, non-glandular; rhizomes elongate, slender, woody; stems erect, upper stems villous; leaves coarsely serrate (teeth mucronate), bases often ± clasping; phyllaries not purplish, margins not purple; rays white (sometimes purplish). The species includes diploids (2n=18; northern half of range) and some triploids (2n=27; coastal ranges in California; Semple, Chmielewski & Chinnappa, 1983; Semple, Chmielewski & Lane 1989).
Last revised 12 May 2025 by J.C. Semple
© 2025 J.C. Semple, including all photographs unless otherwise indicated
1-4. Eurybia radulina. 1. Small plant, Semple & Brouillet 7147, Douglas Co., Oregon. 2. Multiple shoots, Semple et al. 9340, Contra Cost Co., California. 3. Dwarf shoot, Semple et al. 9335, Marin Co., California. 4. Heads, Semple et al. 5677, Mendecino Co., California.