Ptilimnium costatum (Elliott) Rafinesque. Common name: Big Bishopweed. Phenology: Jun-Oct; mid Jul-Oct. Habitat: Tidal freshwater marshes, wet prairies, bottomland hardwood forests. Distribution: Se. NC south to GA, and west to IL, MO, and AR (material from LA and TX is of P. texense); it is rare and disjunct through much of that range. Reported for Georgetown County, SC (Bradley et al. [in prep.]).
ID notes: Ptilimnium costatum has the potential to be a great deal larger and coarser than any other member of the genus, but individuals will be encountered no larger than a fairly robust plant of P. ahlesii or P. capillaceum.
Origin/Endemic status: Endemic
Synonymy ⓘ: = Ar, C, F, FNA13, G, GW2, Il, MC, Mo2, Ok, RAB, S, Tn, Easterly (1957), Feist (2010), Feist et al (2012), Weakley & Nesom (2004); < Ptilimnium costatum (Elliott) Raf. — K4. Basionym: Ammi costatum Elliott 1817
Links to other floras: = Ptilimnium costatum - FNA13
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Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
- Eastern Mountains and Piedmont: FACW
- Great Plains: OBL (taxonomic split from wetland indicator species)
- Midwest: OBL (taxonomic split from wetland indicator species)
Heliophily ⓘ: 8
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© Joey Shaw source | Original Image ⭷
© Joey Shaw source | Original Image ⭷Feedback
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