Flora of North America species comparison

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Calystegia catesbeiana

Calystegia soldanella

Catesby's false bindweed

beach bindweed, beach false bindweed, beach morning-glory, coast morning-glory, seashore false bindweed, seaside morning-glory
Habit Perennials, rhizomatous. Perennials, rhizomatous.
Herbage

pubescent to tomentose, hairs usually whitish.

glabrous.
Stems

usually twining-climbing, sometimes proximally erect, distally twining-climbing, to 40–200(–300) cm.

usually prostrate or trailing, sometimes twining-climbing, to 100(–250) cm.
Leaves

blade elliptic-ovate, to 120 × 50 mm, base lobed, lobes obtuse or rounded, to 20 mm.

blade ± reniform, 15–35(–45) × 20–60(–70) mm, ± fleshy), base ± cuneate, apex emarginate or obtuse.
Bracts

immediately subtending sepals, lanceolate, 12–34 × 10–22 mm, proximally ± keeled, margins ± enfolding sepals, apex acute.

immediately subtending sepals, ovate to suborbiculate, 7–16 × 5–10 mm, proximally flat, ± enfolding sepals.
Flowers

sepals 11–17 mm;

corolla white, 44–64(–70) mm.

sepals 10–16 mm;

corolla pink, 32–52 mm.
2n

= 22 [Asia, Europe].

Calystegia catesbeiana

Calystegia soldanella
Phenology Flowering May–Aug.
Habitat Open, sandy shores.
Elevation 0(–10) m. (0(–0) ft.)
Distribution
from USDA
se United States
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR; VA; WA; BC; South America; w Europe; Asia; Africa; Atlantic Islands (Canary Islands, Tristan da Cunha); Pacific Islands (Galapagos, New Zealand); Australia
[WildflowerSearch map]
[BONAP county map]
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.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.
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
Source FNA vol. 14. FNA vol. 14.
Parent taxa Convolvulaceae > Calystegia Convolvulaceae > Calystegia
Sibling taxa
C. atriplicifolia, C. collina, C. felix, C. hederacea, C. longipes, C. macounii, C. macrostegia, C. malacophylla, C. occidentalis, C. peirsonii, C. pubescens, C. purpurata, C. sepium, C. silvatica, C. soldanella, C. spithamaea, C. stebbinsii, C. subacaulis, C. vanzuukiae
C. atriplicifolia, C. catesbeiana, C. collina, C. felix, C. hederacea, C. longipes, C. macounii, C. macrostegia, C. malacophylla, C. occidentalis, C. peirsonii, C. pubescens, C. purpurata, C. sepium, C. silvatica, C. spithamaea, C. stebbinsii, C. subacaulis, C. vanzuukiae
Subordinate taxa
C. catesbeiana subsp. catesbeiana, C. catesbeiana subsp. sericata
Synonyms Convolvulus soldanella
Name authority Pursh: Fl. Amer. Sept. 2: 729. (1813) (Linnaeus) R. Brown: Prodr., 484. (1810)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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