. 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. Arizona Walnut 221 curved, sessile, the middle pairs slightly longest, blunt or sharp-pointed, rounded or slightly heart-shaped at the base, or the terminal leaflet usually tapering at the base, sharply saw-toothed on the margin, brownish green and scurfy when unfolding, becoming membranous, Ught green and smooth above, paler and somewhat hairy at the junction of the principal veins beneath. The stami- nate flowers, openi
. 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. Arizona Walnut 221 curved, sessile, the middle pairs slightly longest, blunt or sharp-pointed, rounded or slightly heart-shaped at the base, or the terminal leaflet usually tapering at the base, sharply saw-toothed on the margin, brownish green and scurfy when unfolding, becoming membranous, Ught green and smooth above, paler and somewhat hairy at the junction of the principal veins beneath. The stami- nate flowers, opening from March to May, are in slender loose haiiy catkins 5 to 7 cm. long; the bracts are brown- ish hairy on the outer surface; the peri- anth, also hairy, is 5- or 6-lobed; stamens 30 to 40; anthers short, yellow, the connective, prominently notched. The pistillate flowers are terminal, spicate, few together, ovoid, about 3 mm. long; the stigmas are recurved, 12 mm. long and yellow. The fruit is globose, 2 to cm. in diameter with thin, brown husk, finely hairy on the surface. The nut is abnost globular, without ridges, slightly compressed, usually flattened at the base; the walls are thin, light brown, with few shallow grooves; kernel sweet and remaining so for some time before becoming rancid. The wood is hard, rather coarse-grained, dark brown, sometimes beautifully mottled; its specific gravity is about ; it is used for fine cabinet work. The tree is often planted in the Pacific States for shade and as a stock upon which to graft the finer varieties of the European walnut; a hybrid with the latter has also been obtained by Fig. 180. — California Walnut. 5. ARIZONA WALNUT —Juglans major (Torrey) Heller Juglans rupestris major Torrey This tree is larger in all its parts than the Texan walnut and grows further westward in New Mexico and Arizona, also in adjacent Mexico, occurring in canons and on the mountains south as far as Durango. It attains
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