. 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. 256 The Birches nearly smooth on the under side, except the hairy veins; the hairy leaf-stalks are cm. long or less, the stipules ovate. The flowers expand in April or May. The catkins of staminate flowers are 6 to 9 cm. long, mostly in 2's or 3's, their scales ovate and blimt. The ripe pistillate catkins are oblong-cylindric, stalked, 2 to 5 cm. long, about i cm. thick, their scales velvety, hairy-fringed, with 3 nea
. 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. 256 The Birches nearly smooth on the under side, except the hairy veins; the hairy leaf-stalks are cm. long or less, the stipules ovate. The flowers expand in April or May. The catkins of staminate flowers are 6 to 9 cm. long, mostly in 2's or 3's, their scales ovate and blimt. The ripe pistillate catkins are oblong-cylindric, stalked, 2 to 5 cm. long, about i cm. thick, their scales velvety, hairy-fringed, with 3 nearly equal bluntish lobes, or the middle lobe a little longer than the lateral ones; the nut is broadly ovate or oval, to 4 mm. long, wider than its wings. The tree grows rapidly in good soil and is well adapted to park and lawn planting. The wood is light brown, hard and strong, with a specific gravity of , and is largely used for furniture, ox-yokes, woodenware, and for fuel. 12. SANDBERG'S BIRCH — Betula Sandbergi Britton This tree, or shrub, inhabits swamps in Henne- pin county, Minnesota, and has been confused with Betula nigra L. It occurs also in Saskatchewan. The young twigs are loosely hairy and green, becoming brown. The leaves are rhombic-ovate, pointed, rather evenly toothed, firm, dark green, dull, and finely but strongly netted-veined on the upper side, hght green, very glandular and slightly hairy on the veins of the under surface, 6 cm. long or less, the base wedge-shaped; when young they are very glandular on both sides; the slender smooth leaf-stalks are cm. long or less. The flowers open when the leaves are partially grown. The staminate catkins (Saskatchewan specimens) are 6 cm. long or longer. The ripe pistillate catkins are slender-stalked, cylindric, 2 to cm. long, about 6 mm. in diameter, blimt, their scales about 4 mm. Fig. 214. —Sandberg's Birch. long, hairy, 3-lobed at the top, the middle lobe a little lobger than the blunt ascendin
Size: 1214px × 2059px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkhholtandco
