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Chloracantha spinosa var. spinosa
Family:
Asteraceae
FNA
Resources
Scott D. Sundberg+, Guy L. Nesom in Flora of North America (vol. 20)
Stems
50-120(-150) cm, usually thorny proximally but armament of distal portions variable among populations, some producing only thornless, wandlike branches.
Leaves
mostly 10-40 mm.
Involucres
4-5.5(-6) mm.
Ray floret laminae
3.5-5(-7) mm.
2n
= 18.
Flowering (May-)Aug-Nov. Riverbanks, freshwater swamps, bottomlands, low prairies, saline flats, ditches, irrigation channels; 0-1200(-1500) m; Ariz., Calif., La., Nev., N.Mex., Okla., Tex., Utah; Mexico.
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