Jepson Flora Project: Jepson Interchange    

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

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



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)



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.


C. macrostegia (Greene) Brummitt

Perennial or subshrub from woody caudex, glabrous to densely short-hairy
Stem slender and weakly climbing to woody and high-climbing, 1–9 m
Leaf < 13 cm, generally widely triangular and lobed
Inflorescence: peduncle 1–several-flowered, generally > subtending leaf; bractlets 6–37 mm, 4–30 mm wide, lanceolate to ± round, entire, flat to sac-like, attached just below calyx and ± concealing it
Flower: sepals 7–25 mm; corolla 22–68 mm, white or fading pink
Ecology: Generally, dry, rocky ± coastal places
Elevation: < 1000 m.
Bioregional distribution: Central Coast, c&s South Coast Ranges, Southwestern California
Distribution outside California: to Mexico
Synonyms: Convolvulus macrostegius Greene, C. occidentalis var. macrostegius (Greene) Munz


subsp. tenuifolia (Abrams) Brummitt

Plant glabrous to puberulent
Stem trailing or low-climbing
Leaf: blade linear to very narrowly triangular; lobes linear; sinus rounded or square
Inflorescence: bractlets 8–14 mm, 4–8 mm wide, narrowly lanceolate, flat, tip acute
Flower: sepals 7–10 mm; corolla 22–40 mm
Ecology: Dry, ± inland places
Elevation: generally < 500 m.
Bioregional distribution: c&s South Coast Ranges, South Coast, w Peninsular Ranges
Distribution outside California: Baja California
Synonyms: Convolvulus aridus subsp. t. Abrams
Intergrades with subsp. intermedia , subsp. arida, C. longipes
Horticultural information: TRY.

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bioregional map for CALYSTEGIA%20macrostegia%20subsp.%20tenuifolia being generated

Retrieve Jepson Interchange Index to Plant Names entry for Calystegia macrostegia subsp. tenuifolia
Retrieve dichotomous key for Calystegia
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