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Project Name Data (Last Modified On 9/24/2013)

Flora Data (Last Modified On 9/24/2013)
Species Acosmium Schott
PlaceOfPublication Syst. Veg., ed. 16, 4: 406. 1827.
Note TYPE: Acosmium lentiscifolium Schott.
Contributor Michael O. Dillon
Synonym Leptolobium Vog., Linnaea 11: 388. Apr.-Jun. 1837, non Bentham, Jun. 1837; 1838. LECTOTYPE: Leptolobium dasycarpum Vog. = Acosmium dasycarpum (Vog.) Yakovl. Thalesia Mart. ex Pfeiffer, Nom. Bot. 2(2): 1384. 1874, nomen nudum based on Leptolobium Vog., non Raf. 1818, nomen nudum.
Description Trees or shrubs, to 40 m, unarmed. Leaves alternate, imparipinnate; leaflets alternate to subopposite, (3-)5-21, lanceolate to ovate, apically retuse or emar- ginate, basally obtuse to truncate, subcoriaceous or membranaceous; stipules small, caducous or inconspicuous; stipels minute or absent. Inflorescence of ra- cemes or panicles, terminal, rarely completely axillary; bracts and bracteoles narrow, small, often caducous. Flowers small, sessile or pedicellate, calyx tur- binate-campanulate, lobes usually 5, unequal, valvate or rarely narrowly imbri- cate, corolla yellowish white, petals 5, all similar, free, erect patent; stamens 10(5), free, subequal, exserted; filaments inflexed; anthers uniform, ellipsoid, dor- sifixed; ovary sessile or short stipitate, 1-4-ovuled; style filiform; stigma small or truncate, terminal. Fruit oblong to broadly linear, plano-compressed or rarely turgid, indehiscent, coriaceous or woody, narrowly winged, reticulate; seeds ovate or orbicular, compressed, brown to reddish brown, the hilum apical, ellip- tic. Chromosomes: n = 9.
Habit Trees or shrubs
Note Acosmium sensu Yakovlev (1969) is composed of some 17 species
Distribution distributed in tropical and subtropical regions of the Western Hemisphere.
Note Its center of diversity is in Brazil, with only Acosmium panamense extending north into Central America to southern Mexico. While most species are rare and of little economic importance, several of the more widespread species are valuable timber trees used in general construction and the manufacture of charcoal.
Reference Mohlenbrock, R. H. 1963. A revision of the leguminous genus Sweetia. Webbia 17(2): 223-263. Rudd, V. E. 1968. Leguminosae of Mexico-Faboideae (I. Sophoreae and Po- dalyrieae). Rhodora 70: 492-532. Yakovlev, G. P. 1969. A review of Sweetia and Acosmium. Notes Roy. Bot. Gard., Edinburgh 29: 347-355.
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