Flora of North America species comparison

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Senecio flaccidus var. flaccidus
Photo is of parent taxon

threadleaf ragwort
Herbage

usually tomentose (hairs whitish), sometimes unevenly glabrescent.
Involucres

cylindric or weakly campanulate.
Phyllaries

± 13 (± 21), 5– 8+ mm.
Calyculi

bractlets minute or 0.

Senecio flaccidus var. flaccidus
Phenology Flowering mostly summer–fall, less frequently spring.
Habitat Dry, open sandy or rocky plains, streambeds, and canyons
Elevation 800–2400 m (2600–7900 ft)
Distribution
from FNA
AZ; CO; KS; NM; OK; TX; UT; Mexico
[BONAP county map]
Discussion

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).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 559.
Parent taxa Asteraceae > tribe Senecioneae > Senecio > Senecio flaccidus
Sibling taxa
S. flaccidus var. douglasii, S. flaccidus var. monoensis
Synonyms S. douglasii var. jamesii, S. douglasii var. longilobus, S. longilobus
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Apiaceae, Boraginaceae, and Polemoniaceae.)

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