Flora of the Southeastern United States

Rhynchospora caduca Elliott. Common name: Angle-stem Beaksedge. Phenology: Apr-Sep. Habitat: Tidal swamps, pine savannas and flatwoods, hardwood swamps, interdune ponds, acidic meadows and seeps, other wet areas. Distribution: E. and c. VA south to s. FL and west to TX, OK, and AR, north in the interior to sc. TN. This species is found at a few sites in the mountains of GA.

ID notes: The inflorescence branches of R. mixta and (less commonly) R. caduca can spread at right angles from the culm, superficially resembling R. miliacea. The three can be separated by tubercle length: the tubercle of R. miliacea is 0.2-0.4 mm long, while those of R. mixta and R. caduca are 0.4-0.9 mm long.

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, C, ETx1, F, FNA23, G, GW1, K4, NS, POWO, RAB, Tn, Tx, Va, W, WH3, Bridges & Orzell (2023) in Weakley et al (2023), Gale (1944), McMillan (2007); > Rynchospora caduca — S, S13; > Rynchospora patula A.Gray — S, S13. Basionym: Rhynchospora caduca Elliott 1816

Links to other floras: = Rhynchospora caduca - FNA23

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: OBL
• Eastern Mountains and Piedmont: OBL
• Great Plains: OBL
• Midwest: OBL

Heliophily ⓘ: 8