_Salix_ is the classical name of the Willow-tree. CONSPECTUS OF THE NORTH AMERICAN ARBORESCENT SPECIES Scales of the flowers deciduous, pale straw color. Stamens 3 or more. Leaves green on both surfaces; petioles without glands at the base of the leaves; branchlets easily separable. Branchlets reddish or grayish purple; leaves mostly narrow-lanceolate; capsule glabrous. 1. S. nigra (A, C, E). Branchlets yellowish-gray; leaves lanceolate to elliptic-lanceolate; capsule often more or less pubescent. 2. S. Gooddingii (F, G, H). Leaves (at least when fully grown) pale or glaucous below. Petioles without glands. Branchlets easily separable. Leaves narrow-lanceolate to lanceolate; petioles less than ½′ long. 3. S. Harbisonii (C). Leaves lanceolate to ovate-lanceolate, caudate; petioles ½′—¾′ long. 4. S. amygdaloides (A, B). Branchlets not easily separable. Capsules short-stalked (pedicels hardly more than 1/24′ long), ovoid-conic, up to ⅕′ in length; leaves more or less narrow-lanceolate, petioles glabrous or nearly so. 5. S. Bonplandiana (H). Capsules long-stalked (pedicels 1/12′—⅙′ long), more or less acuminate. Petioles puberulous; leaves lanceolate to ovate-lanceolate; stipules without glands on their inner surface; capsules hardly more than ¼′ long. 6. S. lævigata (G, F). Petioles hairy-tomentose; leaves lanceolate; stipules glandular on their inner surface; capsules ¼′—¾′ long. 7. S. longipes (C, D). Petioles glandular; leaves lanceolate to broadly ovate, caudate; branchlets easily separable. Leaves distinctly pale or glaucous below, lanceolate to ovate-lanceolate. 8. S. lasiandra (B, G). Leaves pale green below, ovate to elliptic-lanceolate, abruptly caudate-acuminate. 9. S. lucida (A). Stamens 2. Stigmas linear, 4 or 5 times longer than broad. Leaves linear, hardly more than ⅓′ long; anthers very small, globose; aments small, in fruit hardly up to ⅘′ in length. 10. S. taxifolia (H). Leaves linear-lanceolate to elliptic-lanceolate; up to 2′ in