4. CHRYSOPHYLLUM L.
Trees, with terete branchlets usually coated while young with dense tomentum, and naked buds. Leaves short-petiolate, bright green and glabrous on the upper surface and coated on the lower surface with brilliant silky pubescence or tomentum, persistent. Flowers on pedicels from the axils of minute acute bracts, in dense many-flowered fascicles; calyx usually 5-parted, the divisions nearly equal, obtuse; corolla 5 or rarely 6 or 7-lobed, tubular, campanulate or subrotate, white or greenish white; filaments short, subulate or filiform, enlarged into broad connectives; anthers ovoid or triangular, extrorse or rarely partly introrse, the cells spreading below; ovary usually 5-celled, style crowned by a 5-lobed stigma. Fruit short-oblong, ovoid or globose. Seed ovoid; seed-coat coriaceous, dull or lustrous; hilum subbasilar, elongated, conspicuous; embryo erect, surrounded by more or less pungent fleshy albumen; cotyledons oblong, foliaceous.
Chrysophyllum is tropical, with fifty or sixty species most abundant in the New World, with a small number of species in western and southern tropical Africa, southern Asia, Australia, and the Hawaiian Islands, and with one species in southern Florida. The most valuable species, Chrysophyllum Cainito L., a native of the West Indies and now cultivated in all tropical countries and naturalized in many parts of Central and South America, produces the so-called star-apple, a succulent edible blue or purple and green fruit the size and shape of a small apple.
The generic name, from χρυσός and φύλλον, is in allusion to the golden covering of the under surface of the leaves.
1. [Chrysophyllum oliviforme] Lam. Satin-leaf.
Leaves revolute in the bud, oval, acute or contracted into a short broad point or sometimes rounded at apex, abruptly cuneate at base, thick and coriaceous, bright blue-green on the upper surface and covered on the lower surface and on the petiole with brilliant copper-colored pubescence, 2′—3′ long and 1½′—2′ wide, with a broad prominent midrib deeply impressed on the upper side and numerous straight veins arcuate hear the margins; petioles stout, ½′—⅔′ in length. Flowers appearing in Florida irregularly throughout the year and often found on a branch with ripe or half-grown fruits, on stout pedicels shorter than the petioles, covered like the calyx with rufous tomentum, in few or many-flowered fascicles in the axils of leaves or at the base of lateral branchlets in those of earlier years; calyx divided nearly to the base into broad rounded lobes rather shorter than the tube of the subrotate white corolla with short spreading rounded lobes; ovary 5-celled, pubescent, gradually contracted into a short style crowned by a broad 5-lobed stigma. Fruit usually 1-seeded by abortion, on stems 1′ long, usually only a single fruit being produced from a flower-cluster, ovoid or sometimes nearly globose, dark purple, roughened by occasional excrescences, with a thick tough skin inclosing the juicy sweet mawkish flesh light purple on the exterior, lighter toward the interior, and quite white in the centre; seed narrowed at the ends, ½′ long, covered with a thin light brown coat closely invested with a white glutinous aril-like pulpy mass.
A tree, 25°—30° high, with a tall straight trunk sometimes a foot in diameter, upright branches forming a compact oblong head, and slender slightly zigzag branchlets coated when they first appear with ferrugineous tomentum, becoming in their second year light red-brown or ashy gray and covered with small pale elevated circular lenticels; in sandy soil under the shade of Pine-trees in the Everglade Keys a shrub 6° high or less. Bark of the trunk ¼′ thick, light brown slightly tinged with red, and broken by shallow fissures into large irregularly shaped plates separating on the surface into small thin scales. Wood very heavy, hard, strong, close-grained, light brown shaded with red, with thin lighter colored sapwood.
Distribution. Florida, rich hummocks, from Mosquito Inlet on the east coast to the Everglade Keys, Dade County and to the southern keys, and on the west coast from the shores of the Caloosahatchie River to the neighborhood of Cape Sable; local and nowhere common; on the Bahama Islands, and in Cuba, Porto Rico and Jamaica.