Oenothera linifolia Nuttall. Threadleaf Sundrops, Flaxleaf Sundrops. Phen: May-Jul. Hab: Barrens, glades, dry openings, and fields. Dist: C. VA west to s. IL and se. KS, south to Panhandle FL and se. TX. Some of the occurrences east of the Mississippi River may be adventive. Belden et al. (2004) discuss the Virginia occurrence.
Origin/Endemic status: Native
Synonymy: = Ar, C, F, Fl4, FNA10, G, GrPl, Il, K1, K3, K4, NcTx, RAB, Tn, Tx, Va, W, WH3, Munz (1965), Straley (1977), Wagner, Hoch, & Raven (2007); = Kneiffia linifolia (Nutt.) Spach – S13; = Peniophyllum linifolium (Nutt.) Pennell – S; > Oenothera linifolia Nutt. var. glandulosa Munz
Heliophily: 9
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