Petioles slender, ½′ long. Beureria (p. 861). Petioles short and stout. Leaves coriaceous, with thick revolute margins (_sometimes opposite_). Jacquinia (p. 804). Leaves subcoriaceous, slightly revolute. Leaves reticulate-veined beneath. Leaves oval to obovate or oblong-oval, more or less pubescent while young. Vaccinium (p. 802). Leaves oblong to oblong-obovate, glabrous. Cyrilla (p. 666). Leaves obscurely veined beneath, glabrous. Leaves oblong-lanceolate, narrowed toward the emarginate apex, decurrent nearly to base of petiole. Cliftonia (p. 667). Leaves rounded at apex, distinctly petioled. Maytenus (p. 676). ** Leaves deciduous. † Leaves conspicuous. (††, see p. xxiv.) _a_ Leaves entire, sometimes 3 or 4-lobed. (_aa_, see p. xxiii). _b_ Stipules present. Juice milky. Maclura (p. 331). Juice watery. Stipules connate, enveloping the young leaves, their scars encircling the branchlet. Leaves acute or acuminate, entire; winter-buds pointed, nearly terete. Magnolia (p. 342). Leaves truncate, sinuately 4-lobed; winter-buds obtuse, compressed. Liriodendron (p. 351). Stipules distinct. Branches spinescent; leaves glandular, caducous (_crenately serrate on vigorous shoots_). Dalea (p. 621). Branches not spinescent; leaves without glands. Winter-buds with a single pair of connate scales. Salix (p. 138). Winter-buds with several pairs of imbricate scales. Branchlets without a terminal bud; leaves 3-nerved. Celtis (p. 318). Branchlets with a terminal bud, leaves penniveined. Quercus sp. 17—20 (p. 262). _bb_ Stipules wanting. _c_ Branchlets bright green and lustrous for the first 2 or 3 years; leaves sometimes 3-lobed, aromatic. Sassafras (p. 362).