Flora of North America species comparison

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Calystegia soldanella

Calystegia collina

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

Coast Range false bindweed, hillside morning glory
Habit Perennials, rhizomatous. Perennials, rhizomatous.
Herbage

glabrous.

tomentellous, tomentose, or villous.
Stems

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

ascending-decumbent, to 50 cm, sometimes almost absent.
Leaves

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

in basal rosettes;

blade usually triangular, sometimes notably 3-lobed, to 40 mm, base ± lobed, lobes oblong to triangular, 1–3-pointed, margins ± undulate or not, apex rounded to acute.
Bracts

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

immediately subtending sepals, lanceolate, linear-elliptic, or ovate, 5–17 × 1.5–14 mm.
Flowers

sepals 10–16 mm;

corolla pink, 32–52 mm.

sepals 8–13 mm;

corolla white, (25–)27–50(–55) mm.
2n

= 22 [Asia, Europe].

Calystegia soldanella

Calystegia collina
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 5 (5 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Leaf blades notably 3-lobed, lobes oblong to triangular, margins not notably undulate; bracts 1.5–3.5 mm wide.
subsp. tridactylosa
1. Leaf blades triangular, usually basally lobed and lobes 1–3-pointed, weakly lobed in subsp. collina, margins undulate or not; bracts 4–14 mm wide.
→ 2
2. Sepals glabrous or medially strigose.
→ 3
3. Leaf blades ± triangular, base weakly lobed, lobes seldom well developed, apex rounded to subacute.
subsp. collina
3. Leaf blades broadly triangular, basal lobes well developed, apex acute.
subsp. oxyphylla
2. Sepals, at least outers, hairy, hairs appressed.
→ 4
4. Leaf blades mostly 40 × 40 mm, margins not undulate.
subsp. apicum
4. Leaf blades mostly 10–20 × 10–20 mm, margins undulate.
subsp. venusta
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. 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
Subordinate taxa
C. collina subsp. apicum, C. collina subsp. collina, C. collina subsp. oxyphylla, C. collina subsp. tridactylosa, C. collina subsp. venusta
Synonyms Convolvulus soldanella Convolvulus collinus, C. malacophyllus subsp. collinus
Name authority (Linnaeus) R. Brown: Prodr., 484. (1810) (Greene) Brummitt: Ann. Missouri Bot. Gard. 52: 215. (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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