. 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. 174 The Poplars. Fig. 130. — Wislizenus' Cottonwood. catkins appear in March or April and when in flower are 10 cm. long or less, their scales fringed with filiform lobes; the pistillate flowers are slender-stalked with an ovoid blunt ovary, the stalks becoming i cm. long in fruit or more, and nearly as long as the ovoid-pyrami- dal pointed papillose cap- sule. The wood is very similar to that of Fremont's Cottonwood, but
. 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. 174 The Poplars. Fig. 130. — Wislizenus' Cottonwood. catkins appear in March or April and when in flower are 10 cm. long or less, their scales fringed with filiform lobes; the pistillate flowers are slender-stalked with an ovoid blunt ovary, the stalks becoming i cm. long in fruit or more, and nearly as long as the ovoid-pyrami- dal pointed papillose cap- sule. The wood is very similar to that of Fremont's Cottonwood, but somewhat lighter in weight, its spe- cific gravity being about 10. FREMONT'S COTTONWOOD — Populua Fremontii S. Watson Fremont's cottonwood inhabits valleys in California from the upper Sacramento to the southern part of the State, Lower CaUfomia, and into western Nevada. It is often a very large tree, occasionally 35 meters high, with a trunk up to 2 meters thick; its branches spread widely and droop at the ends. The bark of young trees is light gray and smooth, that of old trunks much thicker, dark brown, and ridged. The young twigs are gray-brown, sometimes finely hairy, becoming orange and smooth. The buds are ovoid, pointed, the terminal ones about I cm. long. The leaves are broadly triangular, ab- ruptly short-pointed, commonly wider than long, coarsely and bluntly toothed, except near the tip, rather thin, 5 to 8 cm. long, the base truncate, or somewhat heart-shaped or kidney-shaped; when unfolding they are finely hairy, but at maturity are Fig. 131. —Fremont's Cottonwood, usually smooth, bright green and somewhat shining on the upper surface; the leaf-stalks are about as long as the blades, slender, and flattened laterally. The tree flowers in February or. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the
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