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CONVOLVULACEAE MORNING-GLORY FAMILY

Robert E. Preston, except as noted

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).
55–60 genera, 1600–1700 species: warm temperate to tropics; some cultivated for food or as ornamental (Ipomoea). [Stefanovic et al. 2003 Syst Bot 28:791–806] 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. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553; Stefanovic et al. 2002 Amer J Bot 89:1510–1522]

Key to Convolvulaceae

CALYSTEGIA MORNING-GLORY

R.K. Brummitt

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.
± 25 species: temperate, worldwide. (Greek: hiding calyx, by bracts of some) [Brummitt 2002 Madroño 49:130–131] 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.
Unabridged references: [Brummitt 1980 Kew Bull 35(2):327–328]

Key to Calystegia

C. peirsonii (Abrams) Brummitt PEIRSON'S MORNING-GLORY
NATIVE
Perennial herb from rhizome, glabrous, ± glaucous. Stem: decumbent to weakly climbing, < 0.4 m. Leaf: blade < 2 cm, narrowly triangular; lobes clearly defined, 1/3–1/2 blade, directed ± basally; sinus deep, narrowly rounded to ± square. Inflorescence: peduncle 2–8 cm, generally < subtending leaf; bracts ± hiding calyx, 3–7 mm, 2.5–4 mm wide, elliptic to widely oblong, entire, flat. Flower: calyx 9–13 mm; corolla 25–40 mm, white.
Rocky slopes; 1000–1500 m. n San Gabriel Mountains, adjacent Mojave Desert. Intergrades with Calystegia longipes (coastal mainland), Calystegia macrostegia, Calystegia occidentalis subsp. occidentalis, perhaps Calystegia sepium. May–Jun [Online Interchange] {CNPS list}

Previous taxon: Calystegia occidentalis subsp. occidentalis
Next taxon: Calystegia purpurata

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 19 2014
Citation for this treatment: [Author of taxon treatment] 2012. Calystegia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=16868, accessed on Apr 19 2014

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Bioregions in which Calystegia peirsonii occurs 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.
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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.