Flora of North America species comparison

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Calystegia soldanella

Calystegia macounii

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

Macoun's false bindweed, Macoun's hedge bindweed
Habit Perennials, rhizomatous. Perennials, rhizomatous.
Herbage

glabrous.

puberulent.
Stems

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

usually ascending-decumbent, sometimes proximally erect, distally weakly twining-climbing, to 50–70 cm.
Leaves

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

blade deltate, ovate, ovate-hastate, or ovate-lanceolate, 20–60 × 15–50 mm, base lobed, lobes ± rhombic, rounded, basal sinus rounded, apex rounded to subacute.
Bracts

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

immediately subtending sepals, oval, ovate, or ovate-oblong, (12–)15–21(–27) × (8–)10–16(–20) mm, proximally flat or slightly saccate, apex usually obtuse, sometimes acute.
Flowers

sepals 10–16 mm;

corolla pink, 32–52 mm.

sepals elliptic to ovate, 12–16 mm;

corolla white, (35–)40–52(–69) mm.
2n

= 22 [Asia, Europe].

Calystegia soldanella

Calystegia macounii
Phenology Flowering May–Aug. Flowering May–Aug.
Habitat Open, sandy shores. Grassy sites, including tall grass and mixed grass prairies, prairie slopes, disturbed sites, meadows, openings in woodlands, stream banks.
Elevation 0(–10) m. (0(–0) ft.) 400–2200 m. (1300–7200 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 FNA
AZ; CO; IA; ID; KS; KY; MN; MO; MT; ND; NE; NM; OK; SD; TX; UT; WY; AB; MB; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Calystegia macounii is morphologically and geographically intermediate between C. catesbeiana and C. malacophylla and between C. malacophylla and C. spithamaea. It differs from C. sepium in habit and leaf shape; in the Great Plains area, it is most readily identifiable by its hairy herbage, C. sepium there being glabrous.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
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. 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
Synonyms Convolvulus soldanella Convolvulus macounii
Name authority (Linnaeus) R. Brown: Prodr., 484. (1810) (Greene) Brummitt: Ann. Missouri Bot. Gard. 52: 215. (1963)
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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