Cirsium horridulum Michaux var. megacanthum (Nuttall) D.J. Keil. Common name: Bigspine Thistle. Phenology: Mar-Jun. Habitat: Moist ground. Distribution: AL and Panhandle FL west to TX and OK.
Origin/Endemic status: Endemic
Synonymy ⓘ: = Ar, FNA19, K4; < Cirsium horridulum Michx. — Fl7, Ok, POWO, WH3; < Cirsium horridulum Michx. — GW2; < Cirsium horridulum Michx. var. vittatum (Small) R.W.Long — SE1; > Cirsium vittatum Small — S; Cirsium megacanthum Nuttall. Basionym: Cirsium megacanthum Nutt. 1841
Links to other floras: = Cirsium horridulum var. megacanthum - FNA19
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FAC (taxonomic split from wetland indicator species)
- Eastern Mountains and Piedmont: FACU (taxonomic split from wetland indicator species)
- Great Plains: FAC (taxonomic split from wetland indicator species)
- Midwest: FACU (taxonomic split from wetland indicator species)
- Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)
Heliophily ⓘ: 8
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Horticultural Information
No horticultural data found for this taxon.