TREATMENT FROM THE JEPSON MANUAL	previous taxon | next taxon Jepson Interchange (more information)
	©Copyright 1993 by the Regents of the University of California Print edition is available from the University of California Press

	The second edition of The Jepson Manual (2012) is available from the University of California Press
	See also the Jepson eFlora, which parallels the Second Edition

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. atriplicifolia Hallier f. subsp. buttensis Brummitt

BUTTE COUNTY MORNING-GLORY

Perennial from rhizome, generally glabrous
Stem decumbent to ± erect, 10–50 cm
Leaf: blade generally 2–4 cm at midrib, generally ± equilaterally triangular-hastate
Inflorescence: peduncle < 5 cm, generally < subtending leaf; bractlets 8–12 mm, 4–8 mm wide, ± cordate-elliptic, entire, obtuse, attached just below calyx, flat, not fully concealing calyx
Flower: sepals 10–15 mm; corolla 30–45 mm, white or pink-tinged
Ecology: UNCOMMON. Dry, rocky places in open forest or chaparral
Elevation: 600–1200 m.
Bioregional distribution: Klamath Ranges (Del Norte Co.), High Cascade Range, San Francisco Bay Area (Mount Diablo)
Synonyms: Convolvulus nyctagineus Greene, in part
Scattered, uncommon, and variable in CA. Ssp. atriplicifolia of OR & WA differs by leaves generally 4–6 cm at midrib, more rounded, less hastate; bractlets generally 15–22 mm; corolla generally 50–70 mm. KR plants are intermediate to subsp. a. SnFrB plants are ± intermediate to C. subacaulis. Also intergrades with C. occidentalis subsp. o
Horticultural information: TRY.