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Calystegia atriplicifolia subsp. buttensis

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.
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
Reference: Brummitt 2002 Madroño 49:130--131
Unabridged Reference: Brummitt 1980 Kew Bull 35(2):327--328
Calystegia atriplicifolia Hallier f. subsp. buttensis Brummitt
Habit: Perennial herb from rhizome, generally glabrous. Stem: decumbent to +- erect, 10--50 cm. Leaf: blade generally 2--4 cm, generally triangular-hastate to reniform; lobes not clearly defined, directed +- laterally, truncate to wedge-shaped or widely rounded, occasionally with shallow sinus. Inflorescence: peduncle < 5 cm, generally < subtending leaf; bracts not fully hiding calyx, 8--12 mm, 3--9 mm wide, +- cordate-elliptic, entire, +- obtuse. Flower: sepals 10--15 mm; corolla 30--45 mm, white (pink-tinged).
Ecology: Dry, rocky places in open forest, chaparral; Elevation: 600--1200 m. Bioregional Distribution: KR, CaRH, SnFrB. Flowering Time: May--Jul Note: Scattered, uncommon, variable; intergrades with Calystegia occidentalis subsp. occidentalis. Plants intermediate to Calystegia atriplicifolia subsp. atriplicifolia of Oregon, Washington, in KR; plants +- intermediate to Calystegia subacaulis in SnFrB.
Synonyms: Convolvulus nyctagineus Greene, in part
Unabridged Note: Calystegia atriplicifolia subsp. atriplicifolia of Oregon & Washington differs by leaf blades generally 4--6 cm, more rounded, less hastate; bracts generally 15--22 mm; corolla generally 50--70 mm. Plants in Del Norte Co. may be new sp.
Jepson eFlora Author: R.K. Brummitt
Reference: Brummitt 2002 Madroño 49:130--131
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

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Botanical illustration including Calystegia atriplicifolia subsp. buttensis

botanical illustration including Calystegia atriplicifolia subsp. buttensis

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Citation for this treatment: R.K. Brummitt 2012, Calystegia atriplicifolia subsp. buttensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 22, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on April 22, 2024.

No expert verified images found for Calystegia atriplicifolia subsp. buttensis.

Geographic subdivisions for Calystegia atriplicifolia subsp. buttensis:
KR, CaRH, SnFrB.
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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).


Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).