. 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. 556 The Locusts The slender branches are spreading, forming a roundish head. The bark is about 3 mm. thick, roughish and dark gray or brown. , The twigs are viscid, red- dish brown and covered with glandular hairs. The leaves are to 3 dm. long, consisting of 11 to 27 leaflets and a stout nearly round petiole which is often glandular and viscid, and slightly enlarged at the base; the leaflets are rather thick and firm,
. 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. 556 The Locusts The slender branches are spreading, forming a roundish head. The bark is about 3 mm. thick, roughish and dark gray or brown. , The twigs are viscid, red- dish brown and covered with glandular hairs. The leaves are to 3 dm. long, consisting of 11 to 27 leaflets and a stout nearly round petiole which is often glandular and viscid, and slightly enlarged at the base; the leaflets are rather thick and firm, ovate, oblong or elliptic, to 4 cm. long, rounded or pointed and bristle tipped at the apex, rounded or tapering at the short-stalked base, entire on the margin, dark green and smooth above, pale and somewhat hairy, especially along the yellowish venation beneath; the stipules are slender, rarely developing into slender spines. The flowers, appearing in May and June and often again in the autumn, are odorless, in dense racemes 5 to 8 cm. long; the slender pedun- cle and pedicels are covered with long glandular hairs. The calyx is red • and hairy, its lobes awl-shaped; the corolla is pink or flesh colored; the standard narrow and marked with yellow blotches; the wing petals are broad. The fruit is linear, flat, 5 to 10 cm. long, somewhat glandular, hispid and viscid, sunken between the seeds, tapering at each end and tipped with the remnants of the style; seeds about 4 mm. long, reddish brown, mottled. The wood is hard, close-grained and brownish; its specific gravity is about It is well known in cultivation as a handsome flowering tree; there are several varieties, some of which are probably hybrids with the common locust. 3. NEW MEXICO LOCUST — Robinia neo-mexicana A. Gray A small tree of mountain sides near streams in New Mexico, Arizona and southern Colorado, at altitudes of 1200 to 3000 meters. It attains a height of meters, with a trunk diameter of d
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