The genera of Leguminosae-Caesalpinioideae & Swartzieae
Type species: C. multiflora (Robinson) Standl.
Habit and leaf form. Trees, or shrubs; crowded on the new growth; unarmed.
Phyllotaxy spiral. The leaves large, compound; bipinnate (with numerous pinnae, terminating in a pair of them); with rachides adaxially ridged. The leaflets many per leaf. Stipules absent or early caducous or very inconspicuous in mature leaves (minute); membranous. Stipels absent.
Inflorescence and floral morphology. The inflorescences axillary and terminal; unbranched; slender, many flowered simple racemes. The flowers not distichous. Bracteoles absent at anthesis.
The flowers hermaphrodite; pentamerous; coloured. Floral tube length relative to total hypanthium + calyx length about 0.25. Hypanthium present. Calyx 5; covering the rest of the flower in bud; polysepalous; members not imbricate. Corolla present; regular to slightly irregular; 5; without greatly reduced members; polypetalous. Petals yellow. The androecium comprising 10 members; members all free of one another; comprising only fertile stamens. Fertile stamens 10. Anthers dehiscing introrsely. Ovary white-tomentose.
Fruit, seed and seedling. Fruit a two-valved pod; winged longitudinally (narrowly, on each side); 2 winged. Seeds with a straight or slightly oblique radicle.
Transverse section of lamina. Leaves without conspicuous phloem transfer cells in the minor veins. Druses common in the mesophyll. Mesophyll secretory cavities absent. Adaxial hypodermis absent. Leaf girders absent. Laminae dorsiventral. Mesophyll without unaligned fibres or sclereids. Minor veins lacking accompanying fibrous tissue.
Leaf lamina epidermes. Epidermal crystals not seen either adaxially or abaxially. Simple unbranched hairs common. No compound or branched eglandular hairs seen. Capitate glands not seen. Hooked hairs not seen. Cassieae-type leaf pseudo-glands not seen. Expanded and embedded hair-feet absent. Basally bent hairs absent. Adaxial: Adaxial interveinal epidermal cell walls straight in optical section; of medium thickness. Stomata adaxially very rare. Abaxial: Abaxial stomata predominantly paracytic. Abaxial epidermis not papillate. Abaxial interveinal epidermal cell walls straight, or gently undulating; scarcely staining with safranin; thin.
Wood anatomy. Wood not storied.
Species number and distribution. 3 species (C. chiapensis, C. multiflora and C. sericea). Mexico.
We advise against extracting comparative information from the descriptions. This is much more easily achieved using the DELTA data files or the interactive key, which allows access to the character list, illustrations, full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, distributions of character states within any set of taxa, geographical distribution, and classification. See also Guidelines for using data taken from Web publications.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 1993 onwards. The genera of Leguminosae-Caesalpinioideae and Swartzieae: descriptions, illustrations, identification, and information retrieval. In English and French. Version: 22nd March 2017. delta-intkey.com/caes’.