Erysimum capitatum (Douglas ex Hooker) E.L. Greene var. capitatum . Western Wallflower. Phen: Apr-Jul; Jun-Aug. Hab: Shale barrens and shale woodlands, limestone bluffs and calcareous rocky woodlands. Dist: MT and BC south to w. TX, CA, and Mexico; disjunct eastwards in AR, MO, TN, KY, WV, VA, IL, etc. Though most floras (including C, F, and G) state or give the impression that Erysimum is not native east of IL, MO, and AR ("rarely adventive farther east along railroads"), this taxon is native and relictual in w. VA (Alleghany and Bath counties), e. WV (Grant and Pendleton counties), ec. TN (Chester, Wofford, & Kral 1997), and c. KY (Campbell 2013).

Origin/Endemic status: Native

Taxonomy Comments: Rollins (1993) interprets E. capitatum as including five varieties, all but the typic restricted to the Great Plains and west.

Synonymy: = Ar, FNA7, K1, K3, NE, Va, Rollins (1993); = Erysimum asperum (Nutt.) DC. var. asperum – C, misapplied; = Erysimum capitatum (Douglas ex Hook.) Greene ssp. capitatum – Al-Shehbaz (1988d); = n/a – Tat; < Cheirinia aspera (Nutt.) Britton – S, misapplied; > Erysimum arkansanum Nutt. – F, S13; < Erysimum asperum (Nutt.) DC. – G, Mex, misapplied; < Erysimum capitatum (Douglas ex Hook.) Greene – GrPl, Il, K4, Mi, NcTx, Tn, Tx

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Heliophily: 8