Calystegia catesbeiana
Calystegia sepium
Catesby's false bindweed
hedge bindweed, hedge false bindweed, larger bindweed, western hedge bindweed
pubescent to tomentose, hairs usually whitish.
glabrate, glabrous, or hairy.
usually twining-climbing, sometimes proximally erect, distally twining-climbing, to 40–200(–300) cm.
trailing or twining-climbing.
blade elliptic-ovate, to 120 × 50 mm, base lobed, lobes obtuse or rounded, to 20 mm.
blade linear, ovate, broadly to narrowly triangular, or triangular-hastate, (24–)36–50(–150) mm, base usually lobed, sometimes nearly truncate, lobes usually 1- or 2-pointed, sometimes rounded, basal sinus usually acute to rounded, rarely almost closed.
immediately subtending sepals, lanceolate, 12–34 × 10–22 mm, proximally ± keeled, margins ± enfolding sepals, apex acute.
immediately subtending sepals, in subsp. erratica, intergrading with sepals, oblong, oval, or ovate, 12–34 × 5–26(–28) mm, proximally flat or keeled, not or scarcely saccate, margins not or scarcely enfolding sepals, apex acute to subobtuse or truncate.
sepals 11–17 mm;
corolla white, 44–64(–70) mm.
sepals lanceolate, 10–19(–25) mm;
corolla pink or white, (28–)30–70(–80) mm.
Calystegia catesbeiana
Calystegia sepium
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.)
Subspecies 8 (6 in the flora).
Subspecies of Calystegia sepium mostly show strong geographic separation; morphologic intermediates between subspecies of C. sepium and between C. sepium and other species of Calystegia make taxonomy difficult. Subspecies roseata Brummitt is known from Atlantic coasts of Europe, temperate coasts of South America, Easter Island, New Zealand, and Australia; subsp. spectabilis Brummitt is known from Europe and Asia.
(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 |
1. Corollas white. | → 2 |
2. Leaf blade basal sinuses acute; corollas 30–50 mm; stamens 17–24 mm. | subsp. sepium |
2. Leaf blade basal sinuses rounded; corollas (28–)44–65(–80) mm; stamens 19–32 mm. | → 3 |
3. Leaf blades broadly triangular, basal lobes spreading, ± 2-pointed. | subsp. angulata |
3. Leaf blades linear to narrowly triangular, basal lobes slightly to abruptly spreading, 1-pointed or rounded. | subsp. binghamiae |
1. Corollas pink. | → 4 |
4. Leaf blade basal sinuses almost closed; bracts intergrading with sepals. | subsp. erratica |
4. Leaf blade sinuses acute or rounded; bracts not intergrading with sepals. | → 5 |
5. Herbage usually pubescent to tomentose, sometimes glabrate or glabrous; leaf blade sinuses acute. | subsp. americana |
5. Herbage glabrous; leaf blade sinuses rounded. | subsp. appalachiana |
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria, Turner Photog. 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
