ANALYTICAL KEY TO THE FAMILIES xix 



U Leaves acute. 



Petioles with 2 glands. 



Conocarpus in Combretaceae (p. 700). 

 Petioles without glands. 



Leaves and hranchlets more or less pubescent, at least while 

 young. 

 Leaves fascicled except on young hranchlets. 



Cercocarpua in Rosaceae (p. 504). 

 Leaves not fascicled. 



Winter-buds minute, with few pointed scales. 



Ilex Cassine in Aquifoliaceae (p. <>i:>). 

 Winter-buds conspicuous, with numerous scales. 



Castanopsis. Fasania, and Quercus in 

 Fagaceae (pp. 2L'2, -2-24, ^r,). 

 Leaves and branchlets glabrous. 



Frunus (Cherry Laurels), in Rosaceae (p. 527). 

 u Stipules wanting. 



m Leaves aromatic when bruised. 



Leaves resinous-dotted. Myricaceae (p. 146). 



Leaves not resinous-dotted. 



Leaves obtuse, obvate, glabrous. Canellaceae (p. 680). 



Leaves acute. 



Leaves mostly rounded at the narrowed base, glabrous. 



Anona in Anonaceae (p. 328). 

 Leaves more or less wedge-shaped at the base. 



Fersea, Ocotea, and Umbellularia in Lauraceae 



(pp. 329, 332, 334). 

 mm Leaves not aromatic. 



n Leaves acute or acutish. 



Leaves obovate, gradually narrowed into short petioles. 

 Leaves 2'-2' long. Schaefferia in Celastraceae (p. 622). 

 Leaves at least G'-8' long. 



Crescentia inBignouiaceae (p. 796). 

 Leaves elliptic to oblong or ovate. 



Leaves rough above, pubescent below, subcordate to cuneate at 

 the base. 



Ehretia and Cordia in Borraginaceae (pp. 781, 785). 

 Leaves smooth above. 

 Winter-buds scaly. 



Rhododendron, Kalmia, Xolisma. Arbutus 

 in Ericaceae (pp. 720. 722, 720, 727). 

 Winter-buds naked. 



Leaves more or less pubescent below. 



Sideroxylum, Dipholis, Chrysophyllum (with 

 milky juice), in Sapotaceae (pp. 737. 7: 58, 745). 

 Leaves glabrous beneath, marked by minute black dots. 



Myrsinaceee (p. 733). 

 nn Leaves obtuse or emarginate at the apex. 



o Leaves rounded or cordate at the base, emarginate, their petioles 

 slender. 



Leaves reniform to broadly ovate, cordate ; juice watery. 



Cercis in Leguminosae (p. 551). 

 Leaves elliptic to oblong, rounded at base ; juice milky or viscid. 



