Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

CONVOLVULACEAE

MORNING-GLORY FAMILY

Lauramay T. Dempster (except Calystegia)

Perennial (annual), generally twining or trailing
Leaves alternate
Inflorescence: cyme or flowers solitary in axils; pedicels often with 2 bracts
Flower bisexual, radial; sepals 5, ± free, overlapping, persistent, often unequal; corolla generally showy, generally bell-shaped, ± shallowly 5-lobed, generally pleated and twisted in bud; stamens 5, epipetalous; pistil 1, ovary superior, chambers generally 2, ovules generally 2 per chamber, styles 1–2
Fruit: generally capsule
Seeds 1–4(6)
Genera in family: 50 genera, 1,000 species: warm temp to tropical; some cultivated as ornamental
Recent taxonomic note: Recently treated to include Cuscutaceae [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553].
(Family description, key to genera by L.T. Dempster)

CONVOLVULUS

MORNING-GLORY, BINDWEED

Annual, perennial herb from caudex or rhizome, generally ± glabrous
Stem generally trailing to high-climbing, generally twisting and twining
Leaf generally > 1 cm, generally petioled; blade generally cordate or hastate
Inflorescence: bracts generally 2, below calyx
Flower generally showy; corolla generally funnel-shaped, pleated, 5-angled or -lobed; stamens included; ovary chambers 2, septa complete, stigma lobes 2, linear or thread-like, not flattened
Fruit spheric, ± inflated
Seeds generally 4
Etymology: (Latin, entwine)
Species in genus: 250 species: generally temp. Not easily distinguished from Calystegia.

Introduced

C. arvensis L.

BINDWEED, ORCHARD MORNING-GLORY

Perennial from deep persistent root, ± glabrous to minutely hairy
Stem prostrate or twining
Leaf generally 2–3 cm; blade round, oblong or ovate, base hastate, tip generally rounded
Inflorescence: peduncles generally 2.5–6 cm, 1–several-flowered, in fruit generally reflexed; bracts ± linear
Flower: calyx ± 5 mm, lobes oblong; corolla 2–2.5 cm, open funnel-shaped, white, purplish outside, particularly at folds, margin entire
Fruit ± 8 mm
Chromosomes: n=24
Ecology: Abundant. Orchards, gardens
Elevation: generally < 1500 m.
Bioregional distribution: California
Distribution outside California: native to Europe
Flowering time: May–Oct
Weedy.

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