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(Last Modified On 1/10/2013)
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(Last Modified On 1/10/2013)
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Genus
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CONOSTEGIA D. Don.
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PlaceOfPublication
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Mem. Wern. Soc. 4:316. 1823.
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Description
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Flowers 5- to 1O-merous. Calyx calyptrate, deciduous at or near the torus in anthesis, the flower-buds globose to pyriform or obovoid. Petals white or pink, often very inequilateral or conspicuously retuse. Stamens isomorphic, two to five times as many as the petals; filaments slender, glabrous; anthers linear or oblong, 4-celled, more or less laterally compressed, opening by a terminal or ventro-terminal pore; connective neither appendaged nor prolonged; thecae often prolonged a short distance below the apex of the filament. Ovary wholly inferior, 5- to 12-celled; style straight or bent; stigma punctiform, truncate, capitate, or broadly peltate and retuse. Fruit a many-seeded berry. Trees or shrubs, with usually pli-nerved leaves and terminal panicles of small or medium-sized white or pink flowers.
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Distribution
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More than 50 species have been described, ranging from southern Mexico and the West Indies to Ecuador and Brazil but most nimerous in Central America.
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Key
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a. Buds globose, apiculate or not, uniformly thick-walled, with no distinc- tion between the hypanthial and calycine portions; stigma (so far as known) broad, retuse, radially lobed. b. Hypanthium about 7 mm. long (measured on the axis), commonly verrucose; leaves very weakly pli-nerved; anthers elliptic, about half as wide as long -- - - - - - - - 1. C. MACRANTHA. bb. Hypanthium about 4 mm. long, smooth; lcaves strongly pli-nerved; anthers about a third as wide as long,..-.......................2. C. OERSTEDIANA. aa. Buds pyriform to obovoid, rarely obtuse, commonly acute, acuminate, or apiculate, with obvious superficial distinction between the hypanthial and calycine portions; stigma neither lobed nor retuse. b. Pubescence of the lower leaf-surface entirely or chiefly of slender simple setae. c. Leaves pli-nerved, bearing petiolar formicaria; buds about 5-6 mm. long. d. Petioles 1.5-5 cm. long; leaf-blades basally rounded --------------------- 3. C. HIRSUTA. dd. Petioles at most 1 cm. long; leaf-blades basally attenuate ------------- 4. C. SETOSA. cc. Leaves 3-nerved; formicaria none; buds about 8 mm. long - 5. C. BRACTEATA. bb. Pubescence of lower leaf-surface, petioles, stems, and hypanthia of long-stipitate stellate hairs ..................- ...................... 6. C. SPECIOSA. bbb. Pubescence of lower leaf-surface of sessile stellate hairs, often minute or scanty, or wholly lacking at maturity. c. Lower leaf-surface completely concealed by a fine, close, canescent tom entum7 L........................................................................ ...................... 7. C. XALAPENSIS. cc. Lower leaf-surface not concealed by the indument. d. Style narrowed distally to a truncate or punctiform stigma. e. Leaves 3-nerved, short-apiculate at the obtuse or rounded summit; buds about 10 mm. long, acuminate ----------------------------- 8. C. POLYANDRA. ee. Leaves 5-pli-nerved, acuminate; buds obtuse, 3.5 mm. long.... 9. C. MICROMERIS. dd. Style of uniform diameter or widened distally; stigma capitate to peltate. e. Leaves of an oblanceolate type, broadest well above the middle. 10. C. PUBERULA. ee. Leaves of an ovate or oblong type, broadest near or below the middle. f. Leaves hirsutulous above, conspicuously dentate and ciliate. 11. C. SUBCRUSTULATA. ff. Leaves glabrous above, entire or nearly so, never ciliate. g. Buds acuminate or rostrate, 7-13 mm. long. h. Petals 4-6 mm. long; buds 7-8 mm. long; leaves stellate-tomentulose on the veins beneath. -------------------- 12. C. MONTANA. hh. Petals 10-15 mm. long; buds 10-13 mm. long; leaves glabrous beneath .--------------------------13. C. CHIRIQUENSIS. gg. Buds rounded at the summit, 3.5-4 mm. long. -14. C. MICRANTHA.
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