ANALYTICAL KEY TO THE GENERA XIX 



B. LEAVES ALTERNATE. 



1. LEAVES SIMPLE. (2, see p. xxvi). 

 * Leaves persistent. (** see p. xxiv) . 



a Leaves deeply 3-5-lobed, g'-f ' long, with linear lobes, hoary tomentose below. . 



Cowania (p. 549). 

 aa Leaves palmately lobed. 



Leaves stellate-pubescent, about l' in diameter, with stipules. 



Fremontia (p. 749). 



Leaves glabrous, l-2 in diameter, without stipules. Carica (p. 755). 



aaa Leaves not lobed or pinnately lobed. 

 6 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 \'-V 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). 

 66 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.) 



/ 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 2|' 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 en- 

 tire), 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; branch- 

 lets 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). 



