. 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. 754 The Rhododendrons and leathery, oblong or oval, 8 to 12 cm. long, pointed at the apex, rounded, narrowed, or somewhat heart-shaped at the base, revolute on the margin, dark green, smooth and shining above, pale and glaucous with the midrib prominent beneath; the leaf-stalk is stout and broad, about 3 cm. long. The flowers ap- pear in May and June in dense clusters often 13 cm. across, on stout pedicels which are hairy
. 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. 754 The Rhododendrons and leathery, oblong or oval, 8 to 12 cm. long, pointed at the apex, rounded, narrowed, or somewhat heart-shaped at the base, revolute on the margin, dark green, smooth and shining above, pale and glaucous with the midrib prominent beneath; the leaf-stalk is stout and broad, about 3 cm. long. The flowers ap- pear in May and June in dense clusters often 13 cm. across, on stout pedicels which are hairy at first, but become smooth, 3 to cm. long; calyx short, the lobes triangular and sharp-pointed; corolla lilac-purple, 4 to 6 cm. across, longer than broad, its lobes irregularly scalloped, and notched at the apex; ovary ribbed and hairy; capsules oblong or oblong-ovoid, to 2 cm. long, the long style and the calyx persisting; seeds numerous and small. This most beautiful species is mainly confined to the higher peaks of the south- em mountains, growing in large areas, and when in bloom gives a distinct color to the landscape. It is sparingly used for ornamental planting and is one of the par- ents of some of the beautiful garden forms that are so largely imported from Europe. CALIFORNIA RHODODENDRON Hooker Rhododendron califomicum An evergreen shrub, at times a small tree, also called Mountain laurel and California mountain laurel; it occurs on rich slopes and in ravines of the Cascade Mountains and along the coast from Mendocino county, California, north- ward to British Columbia, reaching a maximum height of meters. Its branches are stout, erect or nearly so. The bark is thin, close, and scaly. The twigs are stout, smooth or nearly so, and reddish green, becoming red-brown. The leaves are broadly oblong, 7 to 15 cm. long, abruptly short pointed, usually tapering at the base, very slightly revo- lute on the margin, rather thin, leathery, smooth, hght green above,
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