Part 3

_a_ Leaves deeply 3—5-lobed, ⅓′—½′ long, with linear lobes, hoary tomentose below. Cowania (p. 549). _aa_ Leaves palmately lobed. Leaves stellate-pubescent, about 1½′ in diameter, with stipules. Fremontia (p. 749). Leaves glabrous, 1°—2° in diameter, without stipules. Carica (p. 755). _aaa_ Leaves not lobed or pinnately lobed. _b_ Branches spinescent. Leaves clustered at the end of the branches, at least 2′—3′ long. Bucida (p. 765). Leaves fascicled on lateral branchlets, obtuse or emarginate, pale and glabrous beneath. Bumelia angustifolia (p. 816). Leaves scattered. Leaves generally obovate, mucronate, not more than ½′—1′ long, glabrous and green or brownish tomentulose beneath. Condalia (p. 719). Leaves elliptic-ovate to oblong, obtuse or emarginate, glabrous, 1—2 cm. long. Ximenia (p. 337). _bb_ Branches not spinescent. _c_ Leaves serrate, or lobed (_in some species of Quercus_). (_cc_, see p. xxii). _d_ Juice watery. (_dd_, see p. xxii). _e_ Stipules present. (_ee_, see p. xxii). _f_ Primary veins extending straight to the teeth. Leaves and branchlets glabrous or pubescent to tomentose with fascicled hairs. Leaves fulvous-tomentose beneath, repand-dentate, 3′—5′ long. Lithocarpus (p. 236). Leaves glabrous or grayish to whitish tomentose beneath, entire, lobed or dentate. Quercus sp. 21—34 (p. 268). Leaves and branchlets coated with simpled silky or woolly hairs at least while young, not more than 2½′ long. Cercocarpus (p. 550). _ff_ Primary veins arching and united within the margin. Leaves 3-nerved from the base. Ceanothus (p. 726). Leaves not 3-nerved. Leaves acute. Leaves sinuately dentate, with few spiny teeth (_rarely entire_), glabrous. Ilex opaca (p. 669). Leaves serrate. Leaves tomentose below; branchlets tomentose. Leaves narrow-lanceolate, glabrous and smooth above. Vauquelinia (p. 377). Leaves ovate, cordate, scabrate above. Trema (p. 327). Leaves glabrous below. Heteromeles (p. 392). Leaves entire, very rarely toothed. Leaves elliptic, glabrous. Prunus caroliniana (p. 579). Leaves oblanceolate, pubescent beneath when young. Ilex Cassine (p. 670). Leaves obtuse, sometimes mucronate. Leaves spinose-serrate, glabrous. Leaves broad-ovate to suborbicular or elliptic; branchlets dark red-brown, spinescent. Rhamnus crocea (p. 723). Leaves ovate to ovate-lanceolate; branchlets yellow or orange-colored, not spinescent. Prunus ilicifolia (p. 581). Leaves crenate (_often entire_), oval to oblong. Ilex vomitoria (p. 671). _ee_ Stipules wanting. Leaves resinous-dotted, aromatic, 1½′—4′ long. Myrica (p. 163). Leaves not resinous-dotted, crenately serrate, 4′—6′ long. Leaves dark green, glabrous below. Gordonia Lasianthus (p. 751). Leaves yellowish green, pubescent below, sometimes nearly entire. Symplocos (p. 831). _dd_ Juice milky. Petioles 2½′—4′ long; leaves broad-ovate. Hippomane (p. 652). Petioles about ¼′ long; leaves elliptic to oblong-lanceolate. Gymnanthes (p. 654). _cc_ Leaves entire (_rarely sparingly toothed on vigorous branchlets_). _d_ Stipules present. _e_ Stipules connate, at least at first. Stipules persistent, forming a sheath surrounding the branch above the node; leaves obtuse. Coccolobis (p. 338). Stipules deciduous, enveloping the unfolded leaf. Leaves ferrugineous-tomentose beneath. Magnolia grandiflora (p. 345). Leaves glabrous beneath, with milky juice. Ficus (p. 333). _ee_ Stipules free. _f_ Juice milky; leaves oval to oblong, 3′—5′ long. Drypetes (p. 650). _ff_ Juice watery. _g_ Leaves obtuse or emarginate at apex. Leaves with ferrugineous scales beneath, their petioles slender. Capparis (p. 365). Leaves without ferrugineous scales. Leaves soft-pubescent on both sides. Colubrina cubensis (p. 730). Leaves glabrous at least at maturity. Leaves rarely 2′—3′ long, standing on the branch at acute angles. Chrysobalanus (p. 583). Leaves rarely more than 1′ long, spreading (sometimes 3-nerved). Ceanothus spinosos (p. 728). _gg_ Leaves acute or acutish.

Petioles with 2 glands. Conocarpus (p. 766). Petioles without glands. Leaves and branchlets more or less pubescent, at least while young. Leaves fascicled except on vigorous branchlets. Cercocarpus (p. 550). Leaves not fascicled. Winter-buds minute, with few pointed scales. Leaves rounded or nearly rounded at base. Colubrina sp. 1, 3 (p. 729). Leaves broad-cuneate at base. Ilex Cassine (p. 670). Winter-buds conspicuous, with numerous scales. Leaves usually lanceolate, entire, covered below with yellow scales. Castanopsis (p. 234). Leaves oblong or oblong-obovate, repand-dentate, fibrous tomentose below. Lithocarpus (p. 236). Leaves and branchlets glabrous. Leaf-scar with 1 bundle-trace. Ilex Krugiana (p. 672). Leaf-scar with 3 bundle-traces. Cherry Laurels. Prunus sp. 19—22 (p. 579). _dd_ Stipules wanting. _e_ Leaves aromatic when bruised. Leaves resinous-dotted. Myrica (p. 163). Leaves not resinous-dotted. Leaves obtuse, obovate, glabrous. Canella (p. 753). Leaves acute. Leaves mostly rounded at the narrowed base, ovate to oblong, acute, glabrous. Anona (p. 354). Leaves more or less cuneate at base, elliptic to lanceolate, usually acuminate. Leaves abruptly long-acuminate, glabrous, the margin undulate; branchlets red-brown. Misanteca (p. 364). Leaves gradually acuminate or nearly acute. Leaves strongly reticulate beneath. Branchlets glabrous, light grayish brown; leaves glabrous, light green beneath. Ocotea (p. 359). Branchlets pubescent while young, greenish or yellowish; leaves pale beneath, pubescent while young. Umbellularia (p. 360). Leaves not or slightly reticulate, glaucous, glabrous or pubescent beneath. Persea (p. 356).

_ee_ Leaves not aromatic. _f_ Leaves acute or acutish. Leaves obovate, gradually narrowed into short petioles. Leaves 2′—2½′ long. Schæfferia (p. 679). Leaves at least 6′—8′ long. Enallagma (p. 873). Leaves elliptic to oblong or ovate. Leaves rough or pubescent above, pubescent below, subcordate to cuneate at base. Leaves stellate-pubescent. Solanum (p. 867). Leaves scabrous above. Petiole ⅛′—¼′ long; leaves oval or oblong, 1¼′—4′ long. Ehretia (p. 862). Petiole 1′—1½′ long; leaves ovate to oblong-ovate, 3′—7′ long. Cordia (p. 858). Leaves smooth above. Winter-buds scaly. Leaves covered below with ferrugineous or pale scales, 1′—3′ long. Lyonia (p. 797). Leaves glabrous or nearly so below. Leaves ovate-lanceolate or obovate-lanceolate, 4′—12′ long, usually clustered at end of branchlet, veinlets below obscure. Rhododendron (p. 792). Leaves elliptic or oval to oblong or lanceolate. Leaves light yellowish green below and without distinctly visible veins or veinlets, entire, 3′—4′ long. Kalmia (p. 794). Leaves pale below and more or less distinctly reticulate, occasionally serrate or denticulate, 1′—5′ long; bark of branches red. Arbutus (p. 799). Winter-buds naked. Leaves pubescent below when unfolding. Mature leaves nearly glabrous below. Leaves oblong-lanceolate to narrow-obovate. Dipholis (p. 810). Leaves oval. Sideroxylum (p. 809). Mature leaves covered below with brilliant copper-colored pubescence. Leaves glabrous below. Chrysophyllum (p. 817). Leaves marked by minute black dots, ovate to oblong-lanceolate. Ardisia (p. 806). Leaves lepidote, oblong-obovate. Rapanea (p. 807). _ff_ Leaves obtuse or emarginate at apex. _g_ Leaves rounded or cordate at base, emarginate, their petioles slender. Leaves reniform to broad-ovate, cordate; juice watery. Cercis (p. 603). Leaves elliptic to oblong, rounded at base; juice milky or viscid. Leaves emarginate; petioles slender, rufous-tomentulose. Mimusops (p. 819). Leaves obtuse at apex; petioles stout, grayish-tomentulose or glabrous. Rhus integrifolia (p. 664). _gg_ Leaves cuneate at base.

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.)