The genera of Leguminosae-Caesalpinioideae & Swartzieae
Type species: A.letestui Pellegr.
Habit and leaf form. Trees; unarmed.
The leaves compound; pinnate; paripinnate. The leaflets few per leaf (4–5 pairs); opposite or sub-opposite; without noticeably twisted petiolules. Stipules absent or early caducous or very inconspicuous in mature leaves; membranous. Stipels absent.
Inflorescence and floral morphology. The inflorescences terminal; branched; dense, many flowered panicles. The flowers not distichous. Bracts absent at anthesis. Bracteoles present; keeled, small, not enclosing the flower buds; not valvate; free.
The flowers small; hermaphrodite; not pentamerous throughout; departing from pentamery in the calyx, in the corolla, and in the androecium. Hypanthium present, or absent, the androecium hypogynous (?- if present, small). The perianth exclusively sepaline. Calyx 4; polysepalous; more or less regular; members imbricate. Corolla absent. The androecium comprising mostly fewer than 10, usually 7 members; with united members; including staminodia (4). The staminodia 4; free, subulate. Fertile stamens 3–4. Anthers attached well above the base of the connective; dehiscing laterally; dehiscing longitudinally. Ovary sessile or subsessile. Ovules few.
Fruit, seed and seedling. Seeds with a straight or slightly oblique radicle.
Transverse section of lamina. Mesophyll secretory cavities absent.
Species number and distribution. 1 species (A. letestui). West equatorial Africa.
Tribe. Detarieae; Detarieae sensu stricto clade of Bruneau et al. (2008).
Miscellaneous. Illustrations: • A. letestui: Aubréville, Flore du Gabon (1968).
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’.