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The genera of Leguminosae-Caesalpinioideae & Swartzieae

L. Watson and M.J. Dallwitz

Lecointea Ducke.

Type species: L. amazonica Ducke.

Habit and leaf form. Trees; unarmed.

The leaves ostensibly simple (unifoliolate, coarsely serrate); with a predominant midrib. Stipules absent or early caducous or very inconspicuous in mature leaves (caducous).

Inflorescence and floral morphology. The inflorescences axillary; unbranched; simple racemes (these often one-sided). Bracts persistent beyond anthesis. Bracteoles present; small, not enclosing the flower buds; more or less persistent beyond anthesis, or absent at anthesis; not valvate; free.

The flowers small; hermaphrodite; pentamerous, or not pentamerous throughout; departing from pentamery in the calyx, or in the androecium. Hypanthium absent, the androecium hypogynous. The perianth comprising distinct calyx and corolla. Calyx subentire to 5 (with obscure lobes); covering the rest of the flower in bud; Swartzieae type (closed before flowering, splitting more or less irregularly into valvate lobes or teeth) (the limb membranous, subentire or obscurely 5-toothed, splitting down one side); gamosepalous (the tube rather long); members not imbricate. Corolla present; very irregular (the outer petal much broader than the other four, which are subequal); very decidous, 5; without greatly reduced members; polypetalous. Petals imbricate. The androecium comprising 9 members, or 10 members; members all more or less equal in length (to slightly unequal); comprising only fertile stamens. Fertile stamens 9–10. Anthers attached at the base of the connective (? being acum 60,2 62,1 64,1/2 65,2 inate, small, shorter than the filaments, versatile); dehiscing longitudinally. Ovary stipitate; free. Stigma small, oblique, not dilated. Ovules few, or numerous (4–6).

Fruit, seed and seedling. Fruit thick, compressed, indehiscent. Seeds with an inflexed radicle.

Wood anatomy. Wood storied; without normal intercellular canals; without traumatic canals.

Pollen ultrastructure. Tectum papillate; simple papillate. Length of colpi greater than one half pole to pole distance.

Species number and distribution. 7 species (L. amazonica, L. hatschbachii, L. lasiogyne, L. marcano-bertii, L. ovalifolia, L. peruviana, L. tango). South America.

Tribe. Papilionoideae-Exostyleae (former Swartzieae).


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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’.

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