. 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. 264 The Alders dark green cind either smooth or quite hairy on the upper side, paler and more or less hairy beneath; the ovate caducous stipules are about 7 mm. long. The tree flowers in December or January; the staminate catkins are then bright yellow and dm. long or less, each flower usually having 2 stamens, rarely i, or 3. The ripe pistillate catkins are oblong, to 2 cm. long, their scales a httle thickened an
. 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. 264 The Alders dark green cind either smooth or quite hairy on the upper side, paler and more or less hairy beneath; the ovate caducous stipules are about 7 mm. long. The tree flowers in December or January; the staminate catkins are then bright yellow and dm. long or less, each flower usually having 2 stamens, rarely i, or 3. The ripe pistillate catkins are oblong, to 2 cm. long, their scales a httle thickened and somewhat lobed at the apex; the nut is oval, about nam. long, narrowly margined. The weak and brittle wood is of little value; it is light brown with a specific gravity of about 6. OBLONG-LEAVED ALDER —Alnus oblongifolia Torrey An inhabitant of canons, the Oblong-leaved alder is a tree 10 meters high or less, with a trunk to dm. in thickness; it occurs in Arizona, New Mexico, and northern Mexico. By some authors it has been supposed to be identical with A. acuminata H. B. K., of Peru and Bolivia, which extends northward along the Andes, reaching southern Mexico, and has ovate leaves. The bark of the Oblong-leaved alder is thin and light brown. The young twigs are slightly hairy, but soon become smooth, shining, and red to gray. The buds are pointed, smooth, and 10 to 15 mm. long. The leaves are oblong or ob- long-lanceolate, or some of them ovate- oblong, pointed or blunt, rather firm in texture, and 5 to 10 cm. long when fully grown, irregularly sharply toothed, nar- rowed or wedge-shaped at the base; the upper surface is smooth and rather dark green, the lower somewhat lighter green and hairy, at least along the veins; the leaf-stalks are hairy, yellow, i to 2 cm. long; the small stipules are ovate-lanceo- late. The staminate catkins are 9 cm. long or less; the flowers open in December or January; there are usually 2 stamens, considerably longer than the
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