Calyx deeply 5-parted, the lobes erect, whitish. Petals 5, erect, spatulate, inserted on the margin of the thick perigynous disk which lines the base of the calyx. Stamens 5, alternate with the petals. Pistil of 3 several-ovuled carpels, united in the axis, their long styles lightly cohering. Pod large, membranaceous, inflated, 3-lobed, 3-celled, at length bursting at the summit; the cells containing 1--4 bony anatropous seeds. Aril none. Embryo large and straight, in scanty albumen, cotyledons broad and thin.--Upright shrubs, with opposite pinnate leaves of 3 or 5 serrate leaflets, and white flowers in drooping raceme-like clusters, terminating the branchlets. Stipules and stipels deciduous. (Name from σταφυλή, _a cluster_.) 1. S. trifòlia, L. (AMERICAN BLADDER-NUT.) Leaflets 3, ovate, pointed.--Thickets, in moist soil. May.--Shrub 10° high, with greenish striped branches. ORDER 30. ANACARDIÀCEÆ. (CASHEW FAMILY.) _Trees or shrubs, with resinous or milky acrid juice, dotless alternate leaves, and small, often polygamous, regular, 5-merous flowers, but the ovary 1-celled and 1-ovuled, with 3 styles or stigmas._--Petals imbricated in the bud. Fruit mostly drupaceous. Seed without albumen, borne on a curved stalk that rises from the base of the cell. Stipules none. Juice or exhalations often poisonous. 1. RHÚS, L. SUMACH. Calyx small, 5-parted. Petals 5. Stamens 5, inserted under the edge or between the lobes of a flattened disk in the bottom of the calyx. Fruit small and indehiscent, a sort of dry drupe.--Leaves usually compound. Flowers greenish-white or yellowish. (The old Greek and Latin name.) § 1. RHUS proper. _Fruit symmetrical, with the styles terminal._ [*] _Flowers polygamous, in a terminal thyrsoid panicle; fruit globular, clothed with acid crimson hairs; stone smooth; leaves odd-pinnate. (Not poisonous.)_--(§ SUMAC, DC.) 1. R. týphina, L. (STAGHORN SUMACH.) _Branches and stalks densely velvety-hairy_; leaflets 11--31, pale beneath, oblong-lanceolate, pointed, serrate, rarely laciniate.--Hillsides. June.--Shrub or tree 10--30° high, with orange-colored wood. Apparently hybridizes with the next. 2. R. glàbra, L. (SMOOTH S.) _Smooth, somewhat glaucous_; leaflets 11--31, whitened beneath, lanceolate-oblong, pointed, serrate.--Rocky or barren soil. June, July.--Shrub 2--12° high. A var. has laciniate leaflets. 3. R. copallìna, L. (DWARF S.) _Branches and stalks downy; petioles wing-margined_ between the 9--21 oblong or ovate-lanceolate (often entire) leaflets, which are oblique or unequal at the base, smooth and shining above.--Rocky hills. July.--Shrub 1--7° high, with running roots. [*][*] _Flowers polygamous, in loose and slender axillary panicles; fruit globular, glabrous, whitish or dun-colored; the stone striate; leaves odd-pinnate or 3-foliolate, thin. (Poisonous.)_--(§ TOXICODENDRON, DC.)