Trees or shrubs , taprooted; trunks buttressed or not buttressed at base. Bark thin, mostly broadly and shallowly fissured, scaly, fissures anastomosing. Shoots slender, stiff, terete; lenticels raised; buds naked. Leaves persistent or deciduous to late deciduous. Leaf blade leathery or membranous, glabrous to pubescent. Inflorescences axillary or supra-axillary, occasionally from axillary buds on main stem or older stems, solitary flowers or fascicles; peduncle bracteolate. Flowers: receptacle convex to ±globose or elongate, elevated; sepals deciduous, 3(-4), smaller than outer petals, valvate in bud; petals 6(-8) in 2 whorls, usually fleshy, those of outer whorl larger, valvate in bud, those of inner whorl more ascending, distinctly smaller or reduced, rarely absent, valvate or imbricate in bud; nectaries present as darker-pigmented, usually corrugate zones adaxially near petal bases; stamens very numerous, packed into ball, club-shaped, curved; connective dilated, hooded or pointed beyond anther sac; pistils numerous, sessile, partially connate to various degrees with at least stigmas distinct; ovules 1(-2) per pistil; style and stigma club-shaped or narrowly conic. Fruits fleshy syncarps, 1 per flower, usually ovoid to nearly globose, surface variable depending on orientation, structure, and relative connation of pistil apices. Seed usually 1 per pistil, ovoid to ellipsoid, beanlike, coat tough, margins various, narrow. x =7.
Arbustos o árboles. Hojas membranáceas a cartáceas, el nervio principal impreso en la haz. Flores solitarias o inflorescencias terminales, pero frecuentemente aparentando ser opuestas a las axilas o internodales, pedicelos con diminutas bractéolas; sépalos valvados; pétalos 6 en 2 verticilos, o el verticilo interior ausente o rudimentario, los exteriores valvados y carnosos, los internos, cuando presentes, imbricados o valvados, carnosos; estambres numerosos; carpelos numerosos, conniventes, óvulo 1, basal, erecto. Fruto un sincarpo carnoso, esférico u ovoide; semillas aplanadas, elipsoide-obovoides, sin arilo.
Un género con unas 120 especies, de las cuales 110 son neotropicales y las otras 10 son de Africa tropical; 9 especies en Nicaragua y 1 más esperada. Un buen número de estas especies tiene algunos de los frutos tropicales más ampliamente cultivados.
G.E. Schatz. Taxonomic notes on Mesoamerican Annona section Atta (Annonaceae), including Annona pruinosa sp. nov. Novon 2: 249251. 1992.
Shrubs or trees with simple or stellate hairs. Flowers solitary or in few- flowered inflorescences, terminal or opposite the leaves, or extra-axillary from the internodes. Sepals 3, small, valvate. Petals 6, free or connate at the base, biseriate, or the inner rudimentary or absent, the outer valvate, the inner imbricate or valvate. Stamens numerous, the anther cells not locellate, the connective generally terminat- ing in a swollen head or hoodlike process above the pollen sacs. Carpels numerous or rarely few; ovule 1, basal, erect. Fruit fleshy, formed by the concrescence of the carpels and the torus, usually areolate on the surface, the areoles, indicating the united carpels, being often gibbous or acuminate.
Trees or shrubs, with an indument of simple or stellate hairs. Inflorescences terminal, leaf-opposed, extra-axillary, or sometimes cauliflorous, never axillary, 1-flowered or in few-flowered clusters. Pedicel usually short. Sepals 3, small, valvate. Petals 6, in 2 whorls or inner whorl rudimentary or absent, free or connate at base; outer petals valvate, fleshy but leathery when dry, connivent or somewhat spreading, inside basally concave, margin thick; inner petals imbricate or valvate. Stamens many; filament short; connectives apically convex or apiculate. Carpels many, often connate; ovule 1 per carpel, basal; styles clavate; stigmas muriculate. Fruit syncarpous, surface covered with knobs, bulges, spines, or less often smooth. Seeds many per syncarp, embedded in edible pulp.
Carpels numerous, ± united, cylindrical, with 1 erect basal ovule; styles clavate; stigmas muricate
Fruit pedicellate, syncarpous, fleshy, indehiscent, ovoid-globose or cylindrical
Petals usually 6 in 1–2 whorls, both valvate or the inner one imbricate, subequal or the inner ones reduced or absent, free or united at the base, thick and coriaceous, mostly suberect or connivent
Stamens numerous, linear or linear-clavate; filaments short; anther-cells sometimes unequal, extrorse; connective-prolongation obliquely capitate, dilated or ± apiculate
Flowers usually hermaphrodite, solitary, fasciculate or in few-flowered cymes, terminal, leaf-opposed or extra-axillary, pedicellate; buds globose, ovoid or elongate, 3-angled; bracteoles 0–2, persistent
Sepals 3, valvate, free, smaller than the petals
Trees, shrubs or subshrubs, with simple or stellate hairs or glabrous
Seeds numerous, irregularly arranged; aril terminal, compressed, annular or grooved and ridged so as to appear fibrillated.
Seeds irregularly arranged in the syncarp; aril carunculoid.
Fruit a fleshy syncarp, ovoid-globose to cylindric, many-seeded.
Petals 6, free or connate at the base, in two equal or ± unequal whorls, or the inner whorl sometimes absent, both valvate or the inner whorl imbricate, thick, coriaceous, connivent or suberect, concave at the base or throughout.
Sepals 3, valvate, much shorter than the petals, free.
Carpels numerous, free at first or united from the beginning, ± cylindric, with a single basal ovule; style clavate; stigma muricate.
Stamens ?, linear or linear-clavate, with thecae extrorse and often unequal at the base, and connective-prolongation obliquely capitate or apiculate, sometimes ± papillose; filaments short.
Flowers usually bisexual, solitary or in few-flowered cymes or fascicles, terminal or extra-axillary or sometimes on the old wood, pedicellate.
Trees, shrubs or shrublets, not climbing, glabrous or with simple or stellate hairs.
Safford, W. E. 1914. Classification of the genus Annona, with descriptions of new and imperfectly known species. Contr. U.S. Natl. Herb. 18: i-ix, 1-68. Sargent, C. S. 1922. Manual of the Trees of North America (Exclusive of Mexico), ed. 2. Boston and New York. Pp. 354-356. [Reprints in 2 vols., 1961, 1965. New York.] Wood, C. E. 1958. The genera of the woody Ranales in the southeastern United States. J.Arnold Arbor.39: 296-346.
|Custard-apple, soursop, alligator-apple [native Hispaniolan anon or hanon, given to A . muricata ]|