Stylisma pickeringii (Torrey ex M.A. Curtis) A. Gray var. pattersonii (Fernald & Schubert) Myint. Patterson's Dawnflower. Phen: May-Sep. Hab: Longleaf pine sandhills, dry sandy prairies, open sandy woodlands, other dry sandy habitats. Dist: IL and IA south through KS and OK to w. LA and e. TX; disjunct in w. MS (the material somewhat ambiguous as to varietal affinity).

ID notes:Stylisma pickeringii is easily recognizable by its growth form, with numerous stems arching from a central point, then trailing radially away, forming a mound 1-2 meters in diameter. The narrowly linear leaves are borne vertically.

Origin/Endemic status: Native

Synonymy: = Ar, C, FNA14, GrPl, Il, K1, K3, K4, NcTx, Tx, Myint (1966); = Breweria pickeringii (Torr. ex M.A.Curtis) A.Gray var. pattersonii Fernald & Schub. – F, Fernald & Schubert (1949); < Bonamia pickeringii (Torr. ex M.A.Curtis) A.Gray – Shinners (1962d), Wilson (1960b); < Stylisma pickeringii (Torr. ex M.A.Curtis) A.Gray – S

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
• Eastern Mountains and Piedmont: FAC (name change)
• Great Plains: FAC (taxonomic split from wetland indicator species)
• Midwest: UPL (taxonomic split from wetland indicator species)

Heliophily: 8