Silphium perplexum J.R. Allison. Common name: Old Cahaba Rosinweed. Habitat: Dolomitic glades and woodlands. Distribution: Endemic to c. Alabama (Allison & Stevens 2001).
Origin/Endemic status: Endemic
Synonymy ⓘ: = FNA21, K4, NS, POWO; = n/a — S, S13, SE1; = Silphium ×perplexum J.R.Allison, pro species. Basionym: Silphium perplexum J.R.Allison 2001
Links to other floras: = Silphium perplexum - FNA21
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Heliophily ⓘ: 9
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