Asclepias tuberosa subsp. rolfsii
Ann. Missouri Bot. Gard. 31: 368. 1944.
Common names: Rolfs’s milkweed
Endemic
Basionym: Asclepias rolfsii Britton ex Vail in J. K. Small Fl. S.E. U.S., 943, 1336. 1903
Treatment appears in FNA Volume 14.
Revision as of 22:32, 6 October 2024 by imported>Volume Importer
Stems 15–70 cm. Leaf blades lanceolate to oblong or linear-lanceolate, 2.5–6 × 0.3–1.2 cm, base hastate, margins crisped, apex rounded to acute.
Phenology: Flowering year-round; fruiting Jun–Sep.
Habitat: Dunes, sandhills, flood plains, limestone, sandy soils, pine flatwoods, pine, pine-oak, and oak-palmetto scrub.
Elevation: 0–200 m.
Discussion
Subspecies rolfsii is nearly restricted to sandy substrates in peninsular Florida and southern Georgia and is most common on the central ridges of these states. It has been reported in error from Alabama, Mississippi, North Carolina, and Virginia. Plants of subspp. tuberosa and interior from sandy sites in southern South Carolina approach subsp. rolfsii and may be accommodated more properly here.
Selected References
None.
Lower Taxa
None.