Eupatorium rotundifolium var. scabridum
in A. Gray et al., Syn. Fl. N. Amer. 1(2): 99. 1884.
Endemic
Basionym: Eupatorium scabridum Elliott Sketch Bot. S. Carolina 2: 299. 1823
Leaf blades 3-nerved distal to bases, 20–50 × 15–30 mm, broadest near bases, bases broadly cuneate to cuneate, margins serrate. 2n = 20, 30.
Phenology: Flowering Jul–Aug.
Habitat: Disturbed sites
Elevation: 10–100+ m
Distribution
Ala., Ark., Fla., Ga., La., Miss., Mo., Okla., S.C., Tex.
Discussion
Variety scabridum includes apomictic polyploids and has been suggested to have been derived from hybridization between var. rotundifolium and Eupatorium semiserratum.
Selected References
None.
Lower Taxa
None.