6. =Rhús Cótinus=, L. (SMOKE-TREE. VENETIAN SUMAC.) Leaves smooth, obovate, entire, on slender petioles. Flowers greenish, minute, in terminal or axillary panicles. Fruit seldom found. Usually most of the flowers are abortive, while their pedicels lengthen, branch, and form long feather-like hairs, making large cloud-like branches that look somewhat like smoke (whence the name). A shrub or small tree, 6 to 10 ft. high, often planted for ornament; from Europe. [Illustration: R. cotinoìdes.] 7. =Rhús cotinoìdes=, Nutt. (AMERICAN SMOKE-TREE.) Leaves thin, oval, obtuse, entire, acute at base, 3 to 6 in. long, smooth or nearly so. Flowers and fruit like those of the cultivated species (Rhus Cotinus). A tree 20 to 40 ft. high; stem sometimes a foot or more in diameter in the Southern States; wild in Tennessee, west and south. Rare in cultivation. ORDER =XVII. LEGUMINOSÆ.= (PULSE FAMILY.) A very large order of plants, mainly herbaceous; found in all climates. A few are shrubby, and others are from small to large trees. GENUS =28. LABÚRNUM.= Low trees or shrubs with alternate, palmate leaves of three leaflets. Flowers conspicuous, pea-blossom-shaped, in long hanging racemes, in late spring. Fruit pea-pod-shaped, dark brown, and many-seeded; ripe in autumn. [Illustration: L. vulgàre.] =Labúrnum vulgàre.= (LABURNUM. GOLDEN-CHAIN. BEAN-TREFOIL TREE.) Leaves petiolate, with 3 ovate-lanceolate leaflets, pubescent beneath. Flowers bright yellow, nearly 1 in. long, in long (1 ft.), pendulous, simple racemes; in late spring. Pods 2 in. long, linear, many-seeded, covered with closely appressed pubescence; one edge thick; ripe in autumn. A low, very ornamental tree, 10 to 20 ft. high, often cultivated; from Switzerland. Varieties with reddish, purple, and white flowers are also in cultivation. Var. _alpinus_ has smooth pods. GENUS =29. CARAGÀNA.= Leaves alternate, deciduous, abruptly once-pinnate; leaflets mucronate; stipules usually spinescent. Flowers pea-flower-shaped, mostly yellow. Trees or shrubs of Asia. [Illustration: C. arboréscens.] =Caragàna arboréscens=, Larn. (PEA-TREE.) Leaves with 4 to 6 pairs of oval-oblong, mucronate-pointed, hairy leaflets; petioles unarmed; stipules spinescent. Flowers yellow, blooming in May. Pods brown, ripe in August. A low, stiff, erect tree, 10 to 15 ft. high; in poor soil a bush. From Siberia; frequent in cultivation. GENUS =30. CLADRÁSTIS.= Small tree with alternate, odd-pinnate leaves, the base of the petiole hollow, and inclosing the leaf-buds of the next year. Flowers large, pea-blossom-like in shape, in large clusters. Fruit pea-pod-like in shape and size. Wood light yellow, firm and hard. [Illustration: C. tinctòria.]