Euphorbia purpurea (Raf.) Fern., historically known from southern Ohio in the early 1900s, was re-collected in 1987 in Pike County, Ohio. The Ohio population is disjunct by approximately 300 km from the nearest known population.
Euphorbia purpurea (Raf.) Fern. Extant in Ohio
- Jeffrey D. Knoop
- December - 1990