2. =Vibúrnum dentàtum=, L. (ARROW-WOOD.) Leaves, pale green, broadly ovate, somewhat heart-shaped at base, coarsely and sharply dentated, strongly veined and often with hairy tufts in the axils; petioles rather long and slender. Fruit ¼ in. long, in peduncled clusters, blue or purple; a cross-section of the stone between kidney-and horseshoe-shaped. A shrub or small tree, 5 to 15 ft. high, with ash-colored bark; in wet places. [Illustration: V. Lentàgo.] 3. =Vibúrnum Lentàgo=, L. (SWEET VIBURNUM OR SHEEP-BERRY.) Leaves broad, ovate, long-pointed, 2 to 3 in. long, closely and sharply serrated; petioles long and with narrow, curled margins; entire plant smooth. Fruit in sessile clusters of 3 to 5 rays, oval, large, ½ in. long, blue-black, edible, sweet; ripe in autumn. A small tree, 10 to 30 ft. high; found wild throughout, in woods and along streams. [Illustration: V. prunifòlium.] 4. =Vibúrnum prunifòlium=, L. (BLACK HAW.) Leaves oval, obtuse or slightly pointed, 1 to 2 in. long, finely and sharply serrated. Blooming early, May to June. Fruit oval, large (½ in. long), in sessile clusters of 3 to 5 rays, black or blue-black, sweet. A tall shrub or small tree, 6 to 12 ft. high; in dry soil or along streams; New York, south and west. GENUS =48. LONÍCERA.= Leaves entire, opposite; corolla 5-lobed; berry several-seeded. [Illustration: L. Tartárica.] =Lonícera Tartárica=. (TARTARIAN HONEY-SUCKLE.) Leaves deciduous, oval, heart-shaped; flowers in pairs, showy, pink to rose-red; in spring; berries formed of the two ovaries, bright red; ripe in summer. A shrub, often planted and occasionally trimmed to a tree-like form, and growing to the height of nearly 20 ft. ORDER =XXIV. COMPÓSITÆ.= This, the largest order of flowering plants, is made up almost exclusively of herbaceous plants, but contains one shrub or low tree which is hardy from Boston southward near the Atlantic coast. GENUS =49. BÁCCHARIS.= Leaves simple, deciduous; heads of flowers small, many-flowered; receptacle naked; pappus of hairs. [Illustration: B. halimifòlia.] =Báccharis halimifòlia=, L. (GROUNDSEL-TREE.) Leaves obovate, wedge-shaped, crenately notched at end, light grayish in color, with whitish powder; branches angled; flowers white with a tint of purple, blooming in the autumn. A broad, loose-headed, light-colored bush rather than a tree, 8 to 15 ft. high; wild on sea-beaches, Massachusetts and south, and occasionally cultivated. The plant is dioecious; the fertile specimens are rendered quite conspicuous in autumn by their very long, white pappus. ORDER =XXV. ERICÀCEÆ.= (HEATH FAMILY.) A large order, mainly of shrubs, though a few species are herbs, and fewer still are tall enough to be considered trees. GENUS =50. OXYDÉNDRUM.= Trees with deciduous, alternate, oblong-lanceolate, pointed, serrate, sour-tasting leaves. Flowers small, in large panicles at the ends of the branches. In summer. Fruit small, dry capsules, with 5 cells and many seeds.