Trillium pusillum Michaux var. ozarkanum (E.J. Palmer & Steyermark) Steyermark. Subgenus: Delostylis. Ozark Least Trillium. Phen: Apr-May. Hab: Dry to dry-mesic slopes, in NC under Quercus coccinea and Kalmia latifolia. Dist: Centered in the Ozarks of sw. MO, nw. AR, and e. OK; disjunct eastward at scattered localities in sc. KY, nc. TN, sw. NC, and s. MS.

Origin/Endemic status: Endemic

Other Comments: Petals white to pink.

Synonymy: = K1, K3, K4, Mo1, Case & Case (1997); = Trillium ozarkanum E.J.Palmer & Steyerm. – Ar; < Trillium pusillum Michx. – G, RAB, S, Tn, Patrick (1986), Timmerman-Erskine, Dute, & Boyd (2002); < Trillium pusillum Michx. var. pusillum – F, FNA26

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