Cnidoscolus stimulosus (Michaux) Engelmann & A. Gray. Spurge-nettle, Tread-softly, Finger-rot, Bull-nettle. Phen: Late Mar-Aug; May-Sep. Hab: Longleaf pine sandhills, dry sandy woodlands, other dry sandy soils. Dist: Se. VA south to s. FL, west to e. LA, mostly on the Coastal Plain, but farther inland southward.

Origin/Endemic status: Endemic

Taxonomy Comments: Our species is allied to C. urens of Mexico, Central America, and n. South America, and is sometimes treated as a variety of it. Substantial variation in leaf shape, habitat and likely other characters suggest that several taxa may be currently subsumed here.

Synonymy: = C, F, Fl2, FNA12, G, K1, K4, RAB, S13, Va, W, WH3, Maya-Lastra & Steinmann (2018), McVaugh (1944); = Bivonea stimulosa (Michx.) Raf. – S; = Cnidoscolus urens (L.) Arthur var. stimulosus (Michx.) Govaerts – K3, Govaerts, Frodin, & Radcliffe-Smith (2000)

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Heliophily: 7