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Datos del Proyecto Nombre (Last Modified On 12/18/2012)
 

Flora Data (Last Modified On 12/18/2012)
Family LYTHRACEAE
Contributor LORIN I. NEVLING, JR.
Description Herbs, shrubs, or trees. Leaves opposite, whorled or very rarely alternate, simple, entire, pinnately veined, sessile or petiolate; stipules small and caducous or absent. Flowers dichlamydeous, perfect, sometimes dimorphic or trimorphic, in 1- to several-flowered cymes gathered into lateral or terminal clusters, perigynous, actinomorphic or zygomorphic. Hypanthium free from the ovary, tubular, urceolate or campanulate, usually appendiculate between the calyx lobes. Petals inserted near the orifice of the hypanthium, usually of the same number as the calyx lobes or reduced, generally spatulate, crumpled in aestivation. Stamens usually twice the number of calyx lobes or less, rarely more, sometimes hetero- morphic, occasionally alternately unequal, posterior stamen sometimes reduced to a hypogynous gland; anthers included or exserted, generally versatile, dehiscing longitudinally. Ovary superior, sessile or stipitate, sometimes heteromorphic, generally bicarpellate, the placentation axile to free-central; style simple, sometimes heteromorphic, elongate or short; stigma capitate or bilobed. Fruit a dehiscent or indehiscent capsule; seeds sometimes winged, without endosperm, the embryo straight.
Habit Herbs shrubs
Habit trees
Note A family of 22 genera and about 500 species. Cosmopolitan but most abundant in tropical America.
Key a. Leaves and flowers without prominent black punctate glands; herbs, shrubs or trees. b. Flowers relatively small, delicate, 3- to 6-merous; fruit a small mem- branaceous capsule; seeds wingless; herbs or shrubs. c. Flowers 3- to 5-merous, actinomorphic or rarely obscurely zygo- morphic, axillary; hypanthium turbinate or campanulate, about as long as broad, not gibbous or spurred; stamens inserted at one level; herbs. d. Flowers usually solitary; leaves obtuse to attenuate at the base; capsule septicidally dehiscent .----------------------------------------------------------- 1. ROTALA dd. Flowers usually in clusters of 3, rarely 1 or 5; leaves auriculate at the base; capsule dehiscing irregularly. ..................... 2. AMMANNIA cc. Flowers 6-merous, medianly zygomorphic, extra-axillary; hypan- thium tubular, longer than broad, often gibbous or spurred at the base; stamens inserted at two levels; herbs or small shrubs .3. CUPHEA bb. Flowers massive, fleshy, 12- to 16-merous; fruit a large woody capsule; seeds winged; trees ............. .....................................N................ . 4. LAFOENSIA aa. Leaves and flowers with prominent black punctate glands; shrubs or small trees. .............................................................................................. 5. ADENARIA
Note Members of two Asian genera have been introduced into Panama and are sometimes found as escapes. These genera are Lawsonia and Lagerstroemia. Law- sonia inermis L. is cultivated for ornament and because of the henna dye which is extracted from the leaves. Lagerstroeinia indica L. and Lagerstroermia speciosa Pers., known as Crepe Myrtle, are widely cultivated as ornamentals because of their showy pink, purple or white flowers.
 
 
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