Flora of North America species comparison

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Calystegia soldanella

Calystegia purpurata

beach bindweed, beach false bindweed, beach morning-glory, coast morning-glory, seashore false bindweed, seaside morning-glory

Pacific false bindweed, smooth western morning glory
Habit Perennials, rhizomatous. Subshrubs, rootstock woody.
Herbage

glabrous.

glabrous.
Stems

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

ascending-decumbent, trailing, or twining-climbing.
Leaves

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

blade ± triangular to ovate-triangular, 15–50 mm, base lobed, lobes spreading, rounded or 2(–3)-pointed.
Bracts

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

3–10(–16) mm distant from sepals, linear, (2–)3–12(–16) × 0.4–1.5 mm, margins entire or proximally lobed or toothed.
Flowers

sepals 10–16 mm;

corolla pink, 32–52 mm.

sepals 7–14 mm;

corolla white or cream to pale purple, usually purple-striped, (23–)26–46(–52) mm.
2n

= 22 [Asia, Europe].

Calystegia soldanella

Calystegia purpurata
Phenology Flowering May–Aug.
Habitat Open, sandy shores.
Elevation 0(–10) m. (0(–0) ft.)
Distribution
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]
from USDA
California
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Stems strongly twining-climbing; leaf blades triangular, basal sinus V-shaped, apex acute; bract margins entire.
subsp. purpurata
1. Stems ascending-decumbent, trailing, or weakly twining-climbing; leaf blades ovate-triangular, basal sinus ± closed, apex emarginate to rounded; bract margins lobed or toothed.
subsp. saxicola
Source FNA vol. 14. FNA vol. 14.
Parent taxa Convolvulaceae > Calystegia Convolvulaceae > Calystegia
Sibling taxa
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
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. sepium, C. silvatica, C. soldanella, C. spithamaea, C. stebbinsii, C. subacaulis, C. vanzuukiae
Subordinate taxa
C. purpurata subsp. purpurata, C. purpurata subsp. saxicola
Synonyms Convolvulus soldanella Convolvulus luteolus var. purpuratus, C. occidentalis var. purpuratus
Name authority (Linnaeus) R. Brown: Prodr., 484. (1810) (Greene) Brummitt: Ann. Missouri Bot. Gard. 52: 214. (1965)
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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