. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Sourwood 757 specific gravity is about 0,75. This tree deserves a place in parks and lawns of warm temperate regions on account of its peculiar foliage and profusion of small flowers. Xolisma, of which this species is the type, contains about 10 species, occur- ring in North and Central America and the West Indies. The name is Greek and is supposed to have been intended for Cholisma, meaning defective, in refer- ence to t
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. Sourwood 757 specific gravity is about 0,75. This tree deserves a place in parks and lawns of warm temperate regions on account of its peculiar foliage and profusion of small flowers. Xolisma, of which this species is the type, contains about 10 species, occur- ring in North and Central America and the West Indies. The name is Greek and is supposed to have been intended for Cholisma, meaning defective, in refer- ence to the smaller corolla and other differences from closely related genera. V. SOURWOOD GENUS OXYDENDRUM de CANDOLLE Ozydendrom arboreum (Linnaeus) de CandoUe Andromeda arborea Linnaeus m HIS tree is the only species of its genus, and occurs in woodlands from southern Pennsylvania and Maryland to Florida, westward to Indiana, Tennessee, and Louisiana. It attains a maximum height of about 20 meters, with a trunk diameter of about 5 dm. It is locally known as Sorrel tree. Elk-tree, Sour gum, Arrowwood, Titi, tmd Lily-of-the-VaUey tree. The smooth bark is thick, reddish gray and furrowed. The young twigs are smooth, light green, becoming orange to brown. The alternate deciduous leaves are shining, 10 to 15 cm. long, oblong to oval-lanceolate, sharply and finely toothed, rather long- pointed, smooth and bright green on both sides, narrowed at the base; the leaf-stalks vary from i to 2 cm. in length. The numer- ous white flowers are in nodding, clustered racemes at the ends of branches, and open in June or July; their short, ashy-hairy stalks bear 2 minute bractlets at about the mid- dle; there are 5 short sepals, which remain attached to the base of the ashy-hairy fruit; the corolla is ovoid-cylindric, 6 or 7' mm. long, and s-toothed; there are 10 stamens Fig. 692. —Sourwood. about as long as the corolla, the filaments wider than the linear anthers, which open by long chinks to release
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