Crocanthemum canadense (Linnaeus) Britton. Canada Frostweed, Canada Sunrose, Canada Rockrose. Phen: Apr-May (chasm.), May-Aug (cleist.); Jun-Oct. Hab: Fields, woodlands, forest edges, roadsides, disturbed areas. Dist: NS and ME west to MI and MN, south to e. GA, e. AL, e. TN, KY, and MO.

Origin/Endemic status: Native

Synonymy: = FNA6, K3, K4, Mi, NE, NY, S, Va; = Helianthemum canadense (L.) Michx. – C, F, G, Il, K1, Pa, RAB, Tn, W, WV, Daoud & Wilbur (1965), Wilbur & Daoud (1964); > Helianthemum canadense (L.) Michx. var. canadense – F; > Helianthemum canadense (L.) Michx. var. sabulonum Fernald – F

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