Monographs Details:
Authority:
Elias, Thomas S. 1976. A monograph of the genus Hamelia (Rubiaceae). Mem. New York Bot. Gard. 26: 81-144.
Elias, Thomas S. 1976. A monograph of the genus Hamelia (Rubiaceae). Mem. New York Bot. Gard. 26: 81-144.
Family:
Rubiaceae
Rubiaceae
Description:
Species Description - Shrub to 3 m tall; bark light gray; branches terete, inconspicuously lenticellate, glabrous; branchlets terete to subangulate, glabrescent to pilose, slightly swollen at the nodes. Leaves opposite; petioles terete, glabrescent to pilose, 4-22(-28) mm long; mature lamina elliptic to elliptic-obovate, acuminate at apex, mucronate, short to long attenuate at base, submembranous, glabrous, raphides obscure, lateral veins 6-8 pairs, arcuate 35° to 40°, inconspicuously anastomosing; stipules subulate, 1.5-2 mm long, 1-1.5 mm broad at base, glabrous to pilose, persistent. Inflorescences of compact, often compound dichasia, 12-38-flowered, solitary or 2- or 3-fascicled, terminal; peduncles terete, 5-10 mm long, glabrous to pilose; floral axes 4-8 mm long, spreading to subascending, each axis 4-6-flowered; bracts ovate, 0.5-0.7 mm long, pilose, caducous. Flowers not or obscurely secund, 13-18 mm long, pedicellate, the pedicel 2.5-5 mm long; hypanthium subglobose, 2.5-3.5 mm long, glabrous, raphides usually absent, the lobes narrowly ovate, 0.6-1 mm long, ca. 1 mm broad at the base, glabrous to pilose, persisting in fruit; corolla tubular, 11-14.5 mm long, the tube 2-2.5 mm broad, copper-yellow to pale yellow, glabrous, raphides absent, the lobes ovate, 1-2 mm long, ca. 1.5 mm broad at the base, acute at the apex, erect; stamens included, the filaments 2-3 mm long, the anthers 5-6 mm long, the connective disposed apically ca. 1 mm into an ovate, membranous appendage, sagittate at the base, the lobes up to 0.6-0.8 mm long, membranous; gynoecium 6-8 mm long, the stigma oblong, ±swollen, cylindrical, the ovary 5-celled. Berries (immature) globose, 5-7 mm long; seeds 0.7-0.9 mm long, irregular, lustrous (?), foveolate.
Species Description - Shrub to 3 m tall; bark light gray; branches terete, inconspicuously lenticellate, glabrous; branchlets terete to subangulate, glabrescent to pilose, slightly swollen at the nodes. Leaves opposite; petioles terete, glabrescent to pilose, 4-22(-28) mm long; mature lamina elliptic to elliptic-obovate, acuminate at apex, mucronate, short to long attenuate at base, submembranous, glabrous, raphides obscure, lateral veins 6-8 pairs, arcuate 35° to 40°, inconspicuously anastomosing; stipules subulate, 1.5-2 mm long, 1-1.5 mm broad at base, glabrous to pilose, persistent. Inflorescences of compact, often compound dichasia, 12-38-flowered, solitary or 2- or 3-fascicled, terminal; peduncles terete, 5-10 mm long, glabrous to pilose; floral axes 4-8 mm long, spreading to subascending, each axis 4-6-flowered; bracts ovate, 0.5-0.7 mm long, pilose, caducous. Flowers not or obscurely secund, 13-18 mm long, pedicellate, the pedicel 2.5-5 mm long; hypanthium subglobose, 2.5-3.5 mm long, glabrous, raphides usually absent, the lobes narrowly ovate, 0.6-1 mm long, ca. 1 mm broad at the base, glabrous to pilose, persisting in fruit; corolla tubular, 11-14.5 mm long, the tube 2-2.5 mm broad, copper-yellow to pale yellow, glabrous, raphides absent, the lobes ovate, 1-2 mm long, ca. 1.5 mm broad at the base, acute at the apex, erect; stamens included, the filaments 2-3 mm long, the anthers 5-6 mm long, the connective disposed apically ca. 1 mm into an ovate, membranous appendage, sagittate at the base, the lobes up to 0.6-0.8 mm long, membranous; gynoecium 6-8 mm long, the stigma oblong, ±swollen, cylindrical, the ovary 5-celled. Berries (immature) globose, 5-7 mm long; seeds 0.7-0.9 mm long, irregular, lustrous (?), foveolate.
Discussion:
4. Hamelia chrysantha Swartz, Prodr. 46. 1788; Fl. Ind. Occ. 1: 444, 445. 1797, non Jacquin, Coll. 3: 204, 1791. Fig. 3. Duhamelia chrysantha (Swartz) Pers., Synop. PI. 1: 203. 1805. Type. Jamaica. Manchester: near Troy, 666 m, Harris 9365 (lectotype US!; isolectotypes A!, B M , F!, NY!). Although Hamelia chrysantha is known from only a few collections, it can be suitably placed in sect. Hamelia near H. longipes. T h e compact inflorescence, subulate stipules, small leaves, short pedicels, and tubular yellowish corolla separate H. chrysantha from all other species of the genus. Hamelia chrysantha is the only species with yellow, tubular corollas to reach the West Indies.
4. Hamelia chrysantha Swartz, Prodr. 46. 1788; Fl. Ind. Occ. 1: 444, 445. 1797, non Jacquin, Coll. 3: 204, 1791. Fig. 3. Duhamelia chrysantha (Swartz) Pers., Synop. PI. 1: 203. 1805. Type. Jamaica. Manchester: near Troy, 666 m, Harris 9365 (lectotype US!; isolectotypes A!, B M , F!, NY!). Although Hamelia chrysantha is known from only a few collections, it can be suitably placed in sect. Hamelia near H. longipes. T h e compact inflorescence, subulate stipules, small leaves, short pedicels, and tubular yellowish corolla separate H. chrysantha from all other species of the genus. Hamelia chrysantha is the only species with yellow, tubular corollas to reach the West Indies.
Distribution:
Jamaica South America|
Jamaica South America|