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(Last Modified On 9/5/2013)
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(Last Modified On 9/5/2013)
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Genus
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Hamelia Jacq.
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PlaceOfPublication
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Enum. P1. Carib. 16. 1760.
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Note
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LECTOTYPE: H. erecta Jacq. = H. patens Jacq.
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Synonym
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Hamnellia L., Sp. P1., ed. 2, 246. 1762, orth. mut. = Hamelia Jacq. Tangaraca Adans., Fam. P1. 11: 147. 1763. TYPE: not indicated. Lonicera Adans., Fam. P1. 11: 157. 1763. Not Lonicera L. (1753). TYPE: not indicated. Duhamnelia Pers., Syn. P1. 2: 203. 1805. TYPE: not indicated. Tepesia Gaertn., Fruct. Sem. P1. 3: 72. 1805. TYPE: T. dubia Gaertner.
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Description
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Shrubs or small trees. Leaves opposite or in whorls of 3-5, petiolate; stipules free, entire or 3-lobed, small. Inflorescences terminal, of thryses, dichasia or cymes, the floral axes often spreading, the flowers usually secund; bracts decid- uous. Flowers with the hypanthium 5-lobed, the lobes often reduced, persistent
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Habit
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Shrubs or small trees
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Description
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in fruit; corolla tubular or inflated, orange, red or yellow, the lobes 5, imbricate; stamens 5, the connectives produced apically, -the filaments attached at the base of the corolla; ovary (4-)5-celled, the style slender, the stigmas 1-5. Fruits fleshy, the ovarian disc often persistent and forming a truncated cone; seeds numerous, plano compressed, foveolate.
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Distribution
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from southern Florida through Mexico, Central America, the West Indies and South America.
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Note
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There are about 16 species in the genus.
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Reference
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Elias, T. 1976. A monograph of the genus Hamelia (Rubiaceae), Mem. New York Bot. Gard. 26(4): 81-144. Wernham, H. F. 1911. A Revision of the Genus Hamelia. Jour. Bot. London 49: 206-216.
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Key
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a. Corolla funnel shaped, yellow (sect. Amphituba). b. Corolla tube 1.0-1.3 cm long; fruits 0.5-0.7 cm long ......1. H. axillaris bb. Corolla tube 1.8-5.0 cm long; fruits 7-16 mm long. c. Calycine lobes 3-5 mm long; stipules subulate ......2. H. calycosa cc. Calycine lobes 0.2-2.5 mm long; stipules triangular to ovate. d. Corolla tube 4-7 mm broad at the apex; inflorescence 10-25-flowered ...... 8. H. xerocarp a dd. Corolla 10-20 mm broad at the apex; inflorescence 4-15-flowered ...... 3. H. macrantha aa. Corolla tubular, yellow, orange or red (Sect. Hamelia). e. Lateral veins 3-5 pairs. f. Inflorescence a much reduced dichasium, flowers usually 2-5; leaves 0.8-2.8 (-4.8) cm broad ...... 7. H. sanguinea ff. Inflorescence a spreading dichasium or cyme, flowers 3-8; leaves 2-7 cm broad ...... 6. H. rovirosae ee. Lateral veins 5-11 pairs. g. Floral parts and leaves densely villous. h. Leaves with lateral veins 3-5 pairs; seeds 1.0-1.2 mm long ...... 6. H. rovirosae hh. Leaves with lateral veins 7-10 pairs; seeds 0.6-0.9 mm long ...... 5. H. patens gg. Floral parts and leaf undersides glabrous to puberulent. i. Flowers 12-15 mm long; leaves with 11-16 pairs of lateral veins; corolla yellow ...... 4. H. magnifolia ii. Flowers 15-25 mm long; leaves with 7-10 pairs of lateral veins; corolla yellow to red ...... 5. H. patens
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