Calystegia catesbeiana
Calystegia vanzuukiae
Catesby's false bindweed
Van Zuuk false bindweed, Van Zuuk's morning-glory
pubescent to tomentose, hairs usually whitish.
glabrate or hairy, hairs minute, appressed or ascending.
usually twining-climbing, sometimes proximally erect, distally twining-climbing, to 40–200(–300) cm.
trailing or weakly twining-climbing, to 100 cm.
blade elliptic-ovate, to 120 × 50 mm, base lobed, lobes obtuse or rounded, to 20 mm.
blade ± triangular-hastate (daggerlike), 20–40 mm, middle lobe ± lance-linear, (1–)2–7(–9) mm wide, base lobed, lobes 1–2-pointed.
immediately subtending sepals, lanceolate, 12–34 × 10–22 mm, proximally ± keeled, margins ± enfolding sepals, apex acute.
1–2 mm distant from sepals, linear, 5–16(–20) × 0.5–1.5 mm, proximally flat, margins entire or proximally lobed or toothed.
sepals 11–17 mm;
corolla white, 44–64(–70) mm.
sepals ovate to elliptic, 9–11 × 4–6 mm, apices obtuse-apiculate;
corolla white, 27–36 mm.
Calystegia catesbeiana
Calystegia vanzuukiae
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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. | 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. | subsp. sericata |
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