Senecio flaccidus var. flaccidus
Herbage usually tomentose (hairs whitish), sometimes unevenly glabrescent. calyculi: bractlets minute or 0. involucres cylindric or weakly campanulate. phyllaries ± 13 (± 21), 5– 8+ mm.
Phenology: Flowering mostly summer–fall, less frequently spring.
Habitat: Dry, open sandy or rocky plains, streambeds, and canyons
Elevation: 800–2400 m
Ariz., Colo., Kans., N.Mex., Okla., Tex., Utah, Mexico.
Senecio flaccidus var. flaccidus intergrades at least to some extent with var. monoensis in areas of overlapping ranges; a case could be made for treating the two as distinct species, as done by A. Cronquist (1994).