. 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. |i!! 202 The Willows 24. YEW-LEAVED WILLOW —Salix taxifolia Humboldt, Bonpland and Kunth This interesting species, veiy different in aspect and in foliage from other willows, grows along streams in southern Arizona and Texas, south through Mexico to Guatemala, and is reported to occur in Lower California. It is a tree 18 meters high or less, with a trunk up to 4 or 5 dm. in diameter. The thick bark is gray and much fissur
. 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. |i!! 202 The Willows 24. YEW-LEAVED WILLOW —Salix taxifolia Humboldt, Bonpland and Kunth This interesting species, veiy different in aspect and in foliage from other willows, grows along streams in southern Arizona and Texas, south through Mexico to Guatemala, and is reported to occur in Lower California. It is a tree 18 meters high or less, with a trunk up to 4 or 5 dm. in diameter. The thick bark is gray and much fissured, the young twigs densely and finely hairy, becoming smooth and purplish; the wiQter buds are pointed, finely hairy, about 3 mm. long. The leaves are much smaller than those of any other North American tree willow, being only 3 cm. long or less, and 2 to 3 mm. wide; they are linear, pointed at both ends, entire-margined or with a few low teeth, whitish-hairy on both sides when yoimg, becoming dull and rather dark green and smooth or nearly so on the upper side when mature, but remaining more or less hairy be- neath; their stalks are very short, not over 2 -^ mm. long, and the ovate or ovate-lanceolate hairy pointed stipules are about as long as Fig. WiUow. ^^ kaf-stalks and either fall away early or remain until the leaves are fully grown. The catkins are bome at the ends of short branches, are i to cm. long, and flower in Arizona in May, in southern Mexico in January, their oblong-pointed hairy bracts early falling; the staminate flowers have 2 stameiis with filaments hairy toward the base; in the pistillate flowers the ovary is hairy, the lobed stigmas longer than the very short style. The fruiting catkins become i to 2 cm. long, the usually densely hairy capsules ovoid-conic, 5 to 6 mm. long. The tree was first known to Europeans in Mexican gardens. Trees in the Limpia Canon, Texas, have much less hairy capsules than those in central and southern Mexi
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