Jeffersonia diphylla (Linnaeus) Persoon. Twinleaf. Phen: Mar-Apr; May. Hab: Moist and extremely nutrient-rich forests, generally over calcareous or mafic rocks (including limestone, dolostone, amphibolite, greenstone, etc.) or very rich alluvium. Dist: The species is widespread in ne. United States, south to MD, NC, and AL.

ID notes:It is somewhat suggestive of Sanguinaria in both foliage and flower.

Origin/Endemic status: Native

Synonymy: = C, F, FNA3, G, Il, K1, K3, K4, Mi, NY, Pa, RAB, S, Tn, Va, W, WV, Stearn (2002)

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