Perennials, rhizomatous. Herb­age pubescent to tomentose, hairs usually whitish. Stems usually twining-climbing, some­times proximally erect, distally twining-climbing, to 40–200(–300) cm. Leaves: blade elliptic-ovate, to 120 × 50 mm, base lobed, lobes obtuse or rounded, to 20 mm. Bracts immediately subtending sepals, lanceolate, 12–34 × 10–22 mm, proximally ± keeled, margins ± enfolding sepals, apex acute. Flowers: sepals 11–17 mm; corolla white, 44–64(–70) mm.

Distribution

se United States.

Discussion

Subspecies 2 (2 in the flora).

Plants of Calystegia catesbeiana, especially subsp. catesbeiana, often have been misidentified as C. sepium because of their climbing habit.

Selected References

None.

Lower Taxa

Calystegia catesbeiana subsp. catesbeiana, Calystegia catesbeiana subsp. sericata

Key

1	Stems usually weakly twining-climbing, some­times proximally erect, to 40(–100) cm; leaf blades to 60 mm, basal lobes obtuse or rounded, to 11 mm, surfaces usually pubescent, abaxial rarely whitish.	Calystegia catesbeiana subsp. catesbeiana
1	Stems twining-climbing to 200(–300) cm; leaf blades to 120 mm, basal lobes rounded, 9–20 mm, surfaces densely pubescent to tomentose, abaxial usually whitish.	Calystegia catesbeiana subsp. sericata