Calystegia catesbeiana
Calystegia peirsonii
Catesby's false bindweed
Peirson's false bindweed, Peirson's morning-glory
pubescent to tomentose, hairs usually whitish.
glabrous, sometimes glaucous.
usually twining-climbing, sometimes proximally erect, distally twining-climbing, to 40–200(–300) cm.
decumbent, procumbent, or ± twining-climbing, 15–40 cm.
blade elliptic-ovate, to 120 × 50 mm, base lobed, lobes obtuse or rounded, to 20 mm.
blade narrowly triangular-hastate, to 20 mm, base lobed, lobes ± oblong to rhombic, 1-pointed, basal sinus quadrate to rounded.
immediately subtending sepals, lanceolate, 12–34 × 10–22 mm, proximally ± keeled, margins ± enfolding sepals, apex acute.
immediately subtending, or to 3 mm distant from, sepals, elliptic to broadly elliptic-oblong, 3–7 × 2.5–4 mm, margins entire.
sepals 11–17 mm;
corolla white, 44–64(–70) mm.
sepals 9–13 mm;
corolla white, 25–40 mm.
Calystegia catesbeiana
Calystegia peirsonii
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.)
Calystegia peirsonii intergrades with C. longipes and C. macrostegia subspp. cyclostegia and intermedia.
(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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