Linum sulcatum Riddell. Common name: Grooved Yellow Flax. Phenology: May-Oct. Habitat: Prairies; eastwards in dry rocky woodlands, barrens, and blackland prairies over calcareous, mafic, or ultramafic rocks (and sometimes also weedy in adjacent disturbed areas). Distribution: Primarily a species of the Great Plains of WI, MN, and s. ON, s. MB, WI, MN, and ND, to LA and TX, L. sulcatum occurs farther east (to MA, VA, NC, and AL) as a rare disjunct on glades or barrens over rocks such as limestone or diabase.
Origin/Endemic status: Native
Synonymy ⓘ: = Ar, C, F, FNA12, G, GrPl, Il, Mi, NcTx, NY, Pa, RAB, Tn, Tx, Va, W, WV; = Cathartolinum sulcatum (Riddell) Small — S, S13; = Linum sulcatum Riddell var. sulcatum — K4, Mo3, NE, Rogers (1963), Rogers (1984); = Mesynium sulcatum (Riddell) Á.Löve & D.Löve. Basionym: Linum sulcatum Riddell 1836
Links to other floras: = Linum sulcatum - FNA12
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Heliophily ⓘ: 8
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