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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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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
Perennial herb, subshrub, canescent. Stem: prostrate to erect, not twining. Leaf: entire. Inflorescence: flowers 1 in upper leaf axils, on ± 1 side of stem. Flower: calyx ± erect, hiding corolla tube; corolla lobes ± = tube; styles 2, stigma head-like.
4 species: tropics & subtropics. (Greek: a Cretan woman) [Austin 2000 Bot J Linn Soc 133:27–39]
Plant tufted. Stem: 7–25 cm, much-branched from base, densely silky-canescent. Leaf: < 1 cm, ± sessile, elliptic. Inflorescence: peduncle short, bracted. Flower: 5–8 mm; sepals elliptic; corolla white, persistent, lobes ovate, acute; stamens, styles exserted. Seed: often 1, by abortion.
2n=28. Saline and alkaline substrates; < 1500 m. Great Central Valley, Central Western California (except Outer South Coast Ranges), South Coast, Channel Islands, Great Basin Floristic Province (except Warner Mountains, White and Inyo Mountains), Desert (except Desert Mountains); to Oregon, Texas, Mexico, South America. May–Oct [Online Interchange]
Previous taxon: Cressa
Next taxon: Cuscuta
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 5 2015
Citation for this treatment: [Author of taxon treatment] 2013. Cressa, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=21017, accessed on Sep 5 2015
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|Geographic subdivisions indicated for the distribution of Cressa truxillensis|| 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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(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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