Jepson Flora Project: Jepson Interchange    

link to manual TREATMENT FROM THE JEPSON MANUAL (1993) previous taxon | next taxon
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. amplissima Brummitt


Plant becoming ± glabrous
Leaf: lobes 2–3-tipped; sinus widely rounded
Inflorescence: bractlets 19–37 mm, 17–30 mm wide, widely ovate, strongly keeled to sac-like, tip round to acuminate
Flower: sepals 16–25 mm; corolla 47–68 mm
Ecology: UNCOMMON. Rocky slopes, canyon walls
Elevation: generally < 100 m.
Bioregional distribution: s Channel Islands. Most like, but larger than, subsp. macrostegia
Horticultural information: 7, 9, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24; GRCVR.
See the CNPS Inventory for information about endangerment and rarity.
previous taxon | next taxon
bioregional map for CALYSTEGIA%20macrostegia%20subsp.%20amplissima being generated

Retrieve Jepson Interchange Index to Plant Names entry for Calystegia macrostegia subsp. amplissima
Retrieve dichotomous key for Calystegia
Overlay Consortium of California Herbaria specimen data by county on this map
Show other taxa with the same California distribution | Read about bioregions | Get lists of plants in a bioregion
Return to the Jepson Interchange main page
Return to treatment index page

University & Jepson Herbaria Home Page |
General Information | University Herbarium | Jepson Herbarium |
Visiting the Herbaria | On-line Resources | Research |
Education | Related Sites
Copyright © by the Regents of the University of California