. 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. 200 The Willows. Fig. i6i. — Large-leaved Alaskan Willow. 21. LARGE-LEAVED ALASKAN WILLOW —Salix ampIifoUa CoviUe This species is known only from Alaska, where it inhabits coastal sand-dunes; it forms either a shrub or a small tree, the largest individuals recorded being about 8 meters high, with trunks about 3 dm. in diameter. The young twigs are stout, densely hairy, and remain more or less hairy for two or three years,
. 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. 200 The Willows. Fig. i6i. — Large-leaved Alaskan Willow. 21. LARGE-LEAVED ALASKAN WILLOW —Salix ampIifoUa CoviUe This species is known only from Alaska, where it inhabits coastal sand-dunes; it forms either a shrub or a small tree, the largest individuals recorded being about 8 meters high, with trunks about 3 dm. in diameter. The young twigs are stout, densely hairy, and remain more or less hairy for two or three years, becoming purple. The leaves are oval to obovate, 8 cm. long or less, 4 to 6 cm. wide, blunt or short- pointed at the apex, mostly rounded at the base, finely toothed or entire-margined, white silky-hairy on both sides when young, but becoming nearly or quite smooth when very old; they have short hairy stalks I cm. long or less. The catkins appear on short, leafy branches of the season; they are 4 to 6 cm. long, cm. thick, and flower in Jime, de- veloping with the leaves; their bracts are dark brown and persistent; the staminate flowers have two stamens with smooth filaments, and the pistil- late ones have a hairy-stalked, smooth, narrow ovary, a very slender style 2 to 4 mm. long, the deeply 2-lobed stigmas about i mm. long. The fruiting catkins be- come 2 cm. thick and about 8 cm. long, the smooth, narrowly ovoid capsules 8 to 9 mm. long. 22. HOOKER'S WILLOW — Salix Hookeriana Barrett Hooker's willow inhabits sand-dunes along the coast from British Columbia to Oregon, sometimes growing almost within the influence of salt water. While often a shrub, it some- times forms a tree up to 16 meters high, with a trurfk 3 dm. thick or more. The thin, brown bark is slightly fissured, the young twigs densely velvety-hairy, and re- main more or less so during parts of two sea- sons, becoming purple-brown and smooth; the winter buds are hairy, pointed, about 5 mm. long. The leav
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