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bindweed, morning-glory

Habit Annuals or perennials [shrubs], sometimes rhizomatous.
Stems

usually decumbent to procumbent, sometimes ascending, erect, or trailing, seldom twining-climbing, glabrous or hairy, hairs not branched, glandular, or stellate.

Leaves

usually petiolate, rarely sessile;

blade deltate-ovate, oblong, oblanceolate, oblong-elliptic, elliptic, linear, ovate, ovate-lanceolate, ovate-deltate, triangular-lanceolate, or deltate, 10–100 mm, surfaces glabrous or hairy.

Inflorescences

flowers 2–5+ per peduncle [heads] or solitary;

pedicels 10–30 mm;

bracts scalelike, lanceolate, lance-linear, elliptic, linear, obovate, ovate, spatulate, or subulate.

Flowers

sepals elliptic, oblong, oblong-ovate, obovate, ovate, or suborbiculate, 3–12 mm;

corolla usually pink or white, sometimes tinged or striped with blue or pink, center sometimes purplish to reddish, campanulate to ± rotate, (4–)12–30 mm, limb 5-angled to 5-lobed;

ovary 2-locular;

style 1;

stigmas or stigma lobes 2, cylindric, linear, or spatulate, apices acute.

Fruits

capsular, ± globose, ovoid, or conic-ovoid, dehiscence valvate.

Seeds

1–4, trigonous or rounded, glabrous, surfaces granulate, papillulate, smooth, or tuberculate.

x

= 12.

Convolvulus

Distribution
from USDA
North America; Mexico; South America; Eurasia; Africa; Atlantic Islands (Canary Islands); Australia [Introduced in Pacific Islands (Hawaii)]
[BONAP county map]
Discussion

Species 190 (4 in the flora).

Convolvulus althaeoides Linnaeus (collected in California in 1941, 1942, and 1950), C. cneorum Linnaeus, C. sabatius Viviani var. mauritanicus (Bossier) Sa’ad (cultivated as C. mauritanicus Boissier), and C. tricolor Linnaeus are widely cultivated; none of them is known to be established or recurrent in the flora area.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Parent taxa Convolvulaceae
Subordinate taxa
C. arvensis, C. crenatifolius, C. equitans, C. simulans
Key
1. Annuals; corollas 4–6 mm, limb 5-lobed.
C. simulans
1. Perennials; corollas 11–30 mm, limb 5-angled.
→ 2
2. Sepals 3–4.5 mm.
C. arvensis
2. Sepals 6–12 mm.
→ 3
3. Flowers 1(–3) per peduncle; sepals oblong to ovate, 6–12 mm; corollas (15–)25–30 mm.
C. equitans
3. Flowers (1–)3–5+ per peduncle; sepals ± elliptic, 6–7 mm; corollas 11–15(–18) mm.
C. crenatifolius
Name authority Linnaeus: Sp. Pl. 1: 153. (1753): Gen. Pl. ed. 5, 76. (1754)
Source FNA vol. 14. Treatment author: Daniel F. Austin†.
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