S. Americàna.
1. Stỳrax Americàna, Lam. (American Storax.) Shrub or small tree (4 to 10 ft.), with oblong, alternate leaves acute at both ends, 1 to 3 inches long, smooth or very nearly so; fruit ½ in. long, in racemes of 3-4. Wild along streams, Virginia and south; occasionally cultivated, and probably hardy throughout.
S. Japónica.
2. Stỳrax Japónica, Sieb. (Japan Storax.) Leaves alternate, membranaceous, ovate to ovate-lanceolate, serrate or crenate, ½ to 3 in. long, smooth or with short stellate hairs; flowers and fruit in long racemes. A beautiful low tree, 6 to 12 ft. high; from Japan. Hardy as far north as Philadelphia, but needing a little protection in Massachusetts and Missouri.
Genus 57. PTEROSTỲRAX.
Similar to Styrax, but with the fruit in panicles, 5-winged, conical, and crowned with the persistent base of the style.
P. corymbòsum.
Pterostỳrax corymbòsum, Sieb. Leaves deciduous, 2 to 5 in. long, feather-veined, petioled, ovate, rarely cordate at base, sharply serrate, with stellate hairs. Shrub or small tree, 10 to 12 ft. high, cultivated from Japan; with ashy-gray bark, and white flowers turning yellowish or purplish with age; blooming in May, fruit ripe in August. Not perfectly hardy in Massachusetts.