. 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. Crack Willow 191 10. LYALL'S WILLOW —SalixLyallii (Sargent) Heller Salix lasiandra Lyallii Sargent Lyall's willow is closely related botanically to Salix lasiandra Bentham, just described, but it is maintained, by observers who have studied it in its native regions, to be readily distinguishable from that species. It grows along streams and lakes from the Yukon Territory to British Columbia, Mon- tana, and Oregon, perhaps
. 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. Crack Willow 191 10. LYALL'S WILLOW —SalixLyallii (Sargent) Heller Salix lasiandra Lyallii Sargent Lyall's willow is closely related botanically to Salix lasiandra Bentham, just described, but it is maintained, by observers who have studied it in its native regions, to be readily distinguishable from that species. It grows along streams and lakes from the Yukon Territory to British Columbia, Mon- tana, and Oregon, perhaps extending also into California. The differences relied upon to separate this tree from Salix lasiandra Bentham are its larger leaves, sometimes 20 cm. long and 4 cm. wide, mostly rounded or somewhat heart-shaped at the base, and bright white or very pale green on the under side, form- ing strikingly conspicuous fohage; the leaf- stalks are also rather longer and more glandular, and the fruiting catkins larger, sometimes cm. long; the bracts of the catkins are less glandular, sometimes quite entire-margined. Its wood is very similar to that of the Western black Fig. 149. — Lyall's Willow. II. CRACK WILLOW —Salix fragilis Linnaeus. 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 original Britton, Nathaniel Lord, 1859-1934; Shafer, John Adolph. New York : H. Holt and Co.
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