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(Last Modified On 9/27/2013)
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(Last Modified On 9/27/2013)
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Genus
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DUSSIA Krug & Urban ex Taubert
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Contributor
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Michael 0. Dillon
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PlaceOfPublication
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Naturl. Pflanzenfam. 3, Abt. 3: 193. 1892.
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Note
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TYPE: Dussia martinicensis Krug & Urban ex Taubert.
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Synonym
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Vexillifera Ducke, Arch. Jard. Bot. Rio de Janeiro 3: 139. 1922. TYPE: Vexillifera micranthera Ducke = Dussia discolor (Benth.) Amsh. Cashalia Standley, J. Wash. Acad. Sci. 13: 440. 1923. TYPE: Cashalia cuscatlanica Standley = Dussia cuscatlanica (Standley) Standley & Steyermark.
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Description
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Trees, to 50 m high, to 1 m in diameter, the trunk straight, high crowned, the bases buttressed, the bark smooth, gray, sap blood red; stems terete, striate or slightly angular, puberulent to tomentose, glabrate. Leaves imparipinnate, 5-25- foliolate, the leaflets alternate to subopposite, exstipellate; stipules minute, ca- ducous. Inflorescence axillary, racemose or racemose paniculate. Flowers rarely andromonoecious, pink to purple, 15-25 mm long; calyx campanulate, somewhat oblique, the 5 lobes subequal; standard orbicular reniform, persistent; wing straight, the keel petals similar to wings, dorsally tomentose; stamens 10, sub- equal, the filaments connate at the base, 1 subfree, the anthers dorsifixed, ver- satile, ovate; ovary 1-5-ovulate, pubescent, brevistipitate or subsessile, the style pubescent, incurved, the stigma apical, minute. Fruit narrowly ovoid ellipsoid to obovoid, compressed laterally, 2-valved, dehiscent, orange velutinous, commonly 1-2-seeded; seeds red, ellipsoid or cylindrical, the hilum small, linear, lateral; cotyledons thick and fleshy, radicle short, inflexed.
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Habit
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Trees
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Note
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Dussia is an American tropical rain forest element represented by ten species,
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Distribution
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principally from the Antilles and southern Mexico southward to central Peru and the Amazon basin of Brazil.
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Note
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Each species is essentially endemic, occupying small geographic range and usually quite rare within a community. Since all species are large, buttressed trees, adequate collections are difficult to obtain, and flowering or fruiting material is often lacking. Two apparently rare species are found in Panama, each used locally as a lumber source.
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Reference
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Rudd, V. E. 1963. The genus Dussia (Leguminosae). Contr. U.S. Natl. Herb. 32(4): 247-277.
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Key
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a. Leaves 11-25-foliolate, the leaflets predominately oblong to obovate, 7-15 cm long, 2.5- 9.0 cm wide, the lower surface villous with subpatent or sometimes crisp pubescent; bracts larger than bracteoles, 5-10 mm long, 2-4 mm wide, the bracteoles 5-7 mm long, 2-3 mm wide ...... 1. D. cuscatlanica aa. Leaves 5-9-foliolate, the leaflets predominantely elliptic to ovate or obovate, 9-15 cm long, 6-9 cm wide, the lower surface crisp pubescent; bracts smaller than bracteoles, 7-10 mm long, 4-7 mm wide, the bracteoles 9-12 mm long, 8-9 mm wide ...... 2. D. macroprophyllata
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