Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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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)

CALYSTEGIA

MORNING-GLORY

Richard K. Brummitt

Perennial, subshrub from caudex or rhizome, glabrous to tomentose
Stem very short to high-climbing, generally twisting and twining
Leaf generally > 1 cm, linear to reniform, often sagittate to hastate, rarely deeply divided
Inflorescence: peduncle generally 1-flowered; bractlets small and remote from calyx to large and concealing calyx, sometimes lobed
Flower generally showy; corolla glabrous, white or yellow to pink or purple; ovary chamber 1 (septa generally incomplete), stigma lobes 2, generally swollen, cylindric or oblong, ± flattened
Fruit ± spheric, ± inflated
Seeds generally ± 4
Species in genus: ± 25 species: temp, worldwide
Etymology: (Greek: concealing calyx, from bractlets of some)
Reference: [Brummitt 1980 Kew Bull 35(2):327–328]
Intergradation common; intermediate forms often difficult to identify. Appears similar to Convolvulus , but anatomy suggests that the 2 genera are not very closely related.

Native

C. occidentalis (A. Gray) Brummitt

Perennial from woody caudex; puberulent to finely tomentose
Stem decumbent to strongly climbing
Leaf: blade generally 1.5–4 cm at midrib; lobes generally ± distinct, rounded to 2-tipped; sinus rounded to ± square or tapered
Inflorescence: peduncle 1–4-flowered, < to ± > subtending leaf; bractlets 5–12 mm, linear to nearly round, sessile or stalked, entire or lobed like leaves, attached 1–15 mm below calyx, generally ± overlapping but not concealing it
Flower: sepals 9–15 mm; corolla 20–48 mm, white to creamy-yellow
Ecology: Dry slopes, chaparral, pine woods
Elevation: 300–2700 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, High Cascade Range, Sierra Nevada Foothills, High Sierra Nevada, San Francisco Bay Area, Transverse Ranges, Peninsular Ranges, Modoc Plateau
Distribution outside California: Oregon
Synonyms: Convolvulus o. A. Gray

Native

subsp. occidentalis


Stem decumbent to strongly climbing, generally > 1 m
Leaf: lobes generally indistinct, generally 2-tipped
Inflorescence: peduncle often > 1-flowered; bractlets attached 1–7 mm below calyx, 4–18 mm, 1–5 mm wide, generally ± linear-oblong, entire
Ecology: Habitat of sp.
Elevation: < 1200 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, High Cascade Range, High Sierra Nevada, San Francisco Bay Area, Modoc Plateau
Distribution outside California: Oregon
Synonyms: Convolvulus fruticetorum Greene, C. polymorphus Greene
Intergrades with subsp. fulcrata, C. atriplicifolia subsp. buttensis, C. collina subsp. tridactylosa, C. malacophylla, C. peirsonii, C. subacaulis, C. purpurata subsp. p. Plants from CaR, s SN (Greenhorn Mtns), and Teh with leaves ± equilateral, bractlets attached ± 1 mm below calyx, may be called var. tomentella (Greene) Brummitt [Convolvulus t. Greene]
Horticultural information: DRN: 1, 2, 3, 7, 14 &SUN: 15, 16, 17.

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