. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Buttonbush 843 bers of this family, it has been superseded by the more reliable Cinchona barks and their alkaloids, although it is very nearly related to them, having been origi- nally described as a species of Cinchona. The genus comprises about 20 species, all tropical American; the name is Greek in reference to the long-exserted stamens. Exostema parviflorum L. C. Richard, is the type species. III. BUTTONBUSH GENUS CEP
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Buttonbush 843 bers of this family, it has been superseded by the more reliable Cinchona barks and their alkaloids, although it is very nearly related to them, having been origi- nally described as a species of Cinchona. The genus comprises about 20 species, all tropical American; the name is Greek in reference to the long-exserted stamens. Exostema parviflorum L. C. Richard, is the type species. III. BUTTONBUSH GENUS CEPHALANTHUS LINN^US Species Cephalanthus occidentalis Linnaeus SMALL tree or shrub inhabiting swamps and stream banks from New Brunswick to Nebraska, southward to Florida, Texas and northern Mexico; also in Arizona and California; it attains its maximum height of 15 meters, with a trunk diameter of 3 dm. in Arkansas and adja- cent Texas. The crooked branches are outspreading, forming a round top. The bark is about 4 mm. thick, fissured, and splits into narrow scales of a dark brown to nearly black color. The twigs are stout, somewhat angular, pithy, light green and smooth, turning brown and glaucous, and finally dark brown. The buds are gen- erally axillary and very inconspicuous. The deciduous leaves are opposite or in whorls, membranous, oblong, lanceolate or ovate, 7 to 20 cm. long, sharp or some- times taper-pointed, tapering, rounded or slightly heart-shaped at the base, dark green and smooth above, paler, sometimes slightly hairy and prominently veined be- neath; the le'af-stalk is stout, 5 to 15 mm. long. The flowers, opening in spring or summer, are perfect, in axillary or termi- nal, solitary or panicled, globose heads to 5 cm. in diameter, the individual flowers white, in the axils of bracts; the calyx-tube is about 2 mm. long and hairy at the base, the 4 or 5 lobes are short and blunt; the corolla is funnelform, i cm. long, smooth or hairy, its 4 lobes ovate and bl
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