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
For up-to-date information about California vascular plants, visit 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. atriplicifolia Hallier f. subsp. buttensis Brummitt


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.

Information on Distribution was contributed by Martin Lenz (22 Dec 2003):
The enclosed specimens... represent range extensions
See the CNPS Inventory for information about endangerment and rarity.
previous taxon | next taxon
bioregional map for CALYSTEGIA%20atriplicifolia%20subsp.%20buttensis being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Calystegia atriplicifolia subsp. buttensis
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
  • This page is no longer being maintained.

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