2. Rhámnus Caroliniàna, Walt. (CAROLINA BUCKTHORN.) Leaves 3 to 5 in. long, alternate, oblong, wavy and obscurely serrulate, nearly smooth, on slender pubescent petioles. Flowers greenish, 5-parted, solitary or in umbellate clusters in the axils. Fruit berry-like, globular, the size of peas, 3-seeded, black when ripe in September. A thornless shrub or small tree, 5 to 20 ft. high. New Jersey, south and west. Usually a shrub except in the Southern States. [Illustration: R. Califòrnicus.] 3. =Rhámnus Califòrnicus=, Esch. (CALIFORNIA BUCKTHORN.) Leaves evergreen, oval-oblong to elliptical, 1 to 4 in. long, rather obtuse, sometimes acute, generally rounded at base, serrulate or entire. Fruit blackish purple, with thin pulp, ¼ in., 2- to 3-seeded. A spreading shrub, 5 to 18 ft. high, without thorns; from California. GENUS =21. HOVÈNIA.= Leaves alternate, deciduous, simple, oblique at base. Fruit an obscurely 3-lobed, 3-celled, 3-seeded pod in dichotomous clusters, both axillary and terminal. [Illustration: H. dúlcis] =Hovènia dúlcis=, Thunb. Leaves long-petioled, more or less ovate to cordate, serrate, palmately 3-ribbed, much darker on the upper surface; both sides slightly roughened with scattered hairs. Fruit sweet, edible, in clusters in the axils of the leaves; seeds lens-shaped, with a ridge on the inner side. Flowers white; in July. A large, broad-topped tree, introduced from Japan. Hardy at Washington, but dies to the ground in the Arnold Arboretum, Massachusetts. GENUS =22. ZÌZYPHUS.= Leaves simple, alternate, deciduous, 3-ribbed. Flowers axillary, 5-petaled. Fruit fleshy, drupe-like, containing a 1- to 2-celled nut. [Illustration: Z. vulgàris.] =Zìzyphus vulgàris=, Lam. (JUJUBE.) Leaves ovate-lanceolate, obtuse, serrate, smooth, and glossy green on both sides, upper side quite dark; slightly hairy beneath on the veins; prickles twin, one recurved, sometimes none. New growth of the year green, and resembling a once-pinnate compound leaf and usually dropping off in the autumn like one. Leaves 10 to 20 on a twig, 2-ranked; flowers and drupes nearly sessile in the axils; fruit small (¼ in.), blood-red when ripe. A small tree (10 to 30 ft. high), of recent introduction from Syria; hardy at Philadelphia, but needing some protection at the Arnold Arboretum, Massachusetts. ORDER =XV. SAPINDÀCEÆ.= (SOAPBERRY FAMILY.) A large order represented in all countries, and so varied in its characteristics as to form several sub-orders. GENUS =23. ÆSCULUS.= Deciduous trees or sometimes shrubs, with opposite, palmately compound leaves with serrated, straight-veined leaflets. Flowers usually conspicuous in dense terminal panicles. Fruit large, leathery-coated, often rough, with one or few large Chestnut-like but bitter seeds. Fruit large in midsummer, hanging on the tree until frost. * Fruit prickly. (=A.=) =A.= Leaflets usually 7; flowers widely spreading 1.