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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.
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

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.
eFlora Treatment Author: R.K. Brummitt
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botanical illustration including Calystegia atriplicifolia subsp. buttensis


Citation for this treatment: R.K. Brummitt 2016. Calystegia atriplicifolia subsp. buttensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 29, 2016.

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

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

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