Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Calystegia subacaulis subsp. episcopalis

Higher Taxonomy
Family: ConvolvulaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, subshrub, generally twining or trailing. Leaf: 0 or alternate. Inflorescence: cyme or flowers 1 in axils; bracts subtending flowers 0 or 2. Flower: bisexual, radial; sepals (4)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, each generally 2-ovuled, styles 1--2. Fruit: generally capsule. Seed: 1--4(6).
Genera In Family: 55--60 genera, 1600--1700 species: warm temperate to tropics; some cultivated for food or as ornamental (Ipomoea). Note: Monophyletic only if Cuscutaceae included, as treated here. Ipomoea cairica (L.) Sweet, Ipomoea hederacea Jacq. [Ipomoea nil L., misappl.], Ipomoea indica (Burm.) Merr. (including Ipomoea mutabilis Ker Gawl.), Ipomoea purpurea (L.) Roth, Ipomoea triloba L., all included in TJM (1993), not naturalized.
eFlora Treatment Author: Robert E. Preston, except as noted
Scientific Editor: Thomas J. Rosatti.
Genus: CalystegiaView DescriptionDichotomous Key

Habit: Perennial herb, subshrub from caudex or rhizome, glabrous to tomentose. Stem: short to high-climbing, generally twisting, twining. Leaf: generally > 1 cm, linear to reniform or sagittate to hastate (deeply divided). Inflorescence: peduncle generally 1-flowered; bracts generally +- opposite, lobed or not, > 1 mm below calyx, not hiding it, small, to < 1 mm below calyx, hiding it or +- so, large. Flower: generally showy; corolla glabrous, white or yellow to pink or purple; ovary chamber 1, style 1, stigma lobes 2, oblong, tips obtuse. Fruit: +- spheric, +- inflated. Seed: generally +- 4.
Species In Genus: +- 25 species: temperate, worldwide. Etymology: (Greek: hiding calyx, by bracts of some) Note: Intermediates common, often difficult to identify. Molecular evidence indicates close relationship with Convolvulus (Carine et al. 2004 Amer J Bot 91:1070--1085). Bracts qualify as bractlets by some definitions. Leaf blade length measured along midrib.
eFlora Treatment Author: R.K. Brummitt
Species: Calystegia subacaulisView Description 

Habit: Perennial herb from rhizome or woody caudex; +- hairy. Stem: decumbent or ascending, 2--20 cm. Leaf: blade 3--4 cm, +- triangular-hastate, with small backward-directed lobes or not; base tapered; tip acute to rounded. Inflorescence: peduncle < 3.3 cm, < subtending leaf; bracts +- hiding calyx, 7--17 mm, generally +- 4--9 mm wide, widely ovate to lanceolate or oblong. Flower: sepals 10--13 mm; corolla 33--62 mm, white or cream (pink- or purple-tinged).
Note: Subspecies intergrade.

Calystegia subacaulis subsp. episcopalis Brummitt
Habit: Plant generally minutely appressed-hairy; basal rosette 0. Stem: decumbent to ascending, +- 20 cm. Leaf: basal rosette 0; blade generally triangular-hastate to reniform; lobes not clearly defined, directed +- laterally, truncate to wedge-shaped or widely rounded, occasionally with shallow sinus. Inflorescence: bracts generally +- 12 mm, generally +- 4 mm wide, lanceolate, acute.
Ecology: Dry, open scrub, woodland; Elevation: < 500 m. Bioregional Distribution: c SCoRO (San Luis Obispo Co.). Flowering Time: Apr--Jun Note: Intergrades with Calystegia collina subsp. venusta.
eFlora Treatment Author: R.K. Brummitt
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Calystegia subacaulis
Next taxon: Calystegia subacaulis subsp. subacaulis

Name Search


Citation for this treatment: R.K. Brummitt 2016. Calystegia subacaulis subsp. episcopalis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 04, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 04, 2016.

Calystegia subacaulis subsp. episcopalis
click for enlargement
© 2011 Aaron E. Sims
Calystegia subacaulis subsp. episcopalis
click for enlargement
© 2005 Dieter Wilken

More photos of Calystegia subacaulis subsp. episcopalis in CalPhotos

Geographic subdivisions for Calystegia subacaulis subsp. episcopalis:
c SCoRO (San Luis Obispo Co.).
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.