ANALYTICAL KEY 



TO THE FAMILIES OF PLANTS INCLUDED IN THIS BOOK, 

 BASED ON THE CHARACTER OF THE LEAVES 



1. Leaves opposite. 

 *Leaves simple. 

 -^Leaves persistent. 

 a Leaves with stipules. 



Leaves entire or sometimes slightly crenate or serrate. 



Leaves emarginate at the apex, very short-stalked, 1^-2' long. 

 Leaves obovate, gradually narrowed into the petioles. 



Gyminda in CelastraceaB (p. 621). 

 Leaves oval to oblong, rounded or broadly cuneate at the base {rarely alter- 

 nate). 



Reynosia and Krugiodendron in Rhamnaceae (pp. 658, 660). 

 Leaves obtusish, 3i'-5' long. Rhizophoraceae (p. 691). 



Leaves acute or acuminate. 



Exostema and Guettarda in Rubiaceae (pp. 800, 803). 

 Leaves serrate {usually compound). Lyonothamnus in Rosaceae (p. 350). 



aa Leaves without stipules. 



Petioles with 2 large glands ; leaves obtuse, l^'-2^' long. 



Laguncularia in Combretaceae (p. 703). 

 Petioles not glandular. 



Leaves furnished on the under side with dark glands, obtuse to acute, aromatic ; 

 petioles short. Myrtacese (p. 693). 



Leaves without glands on the under side. 

 Leaves obtuse or emarginate, rarely acute. 



Leaves green and glabrous beneath, obovate to oblong-ob ovate, l'-l|' long 



{sometimes alternate). Nyctagiiiaceae (p. 313). 



Leaves pubescent or cauescent beneath, generally obovate-oblong, 2'-4' long. 



Verbenaceae (p. 787). 

 Leaves acute or acuminate, glabrous. Osmanthus in Oleaceae (p. 779). 

 -4--t-Leaves deciduous. 



a Leaves without lobes. 

 b Leaves serrate. 



Winter-buds with several opposite outer scales ; leaves puberulous beneath. 



Evonymus in Celastraceae (p. 619). 

 Winter-buds enveloped by 2 large scales ; leaves glabrous, or ruf ous-tomentu- 

 lose along the midribs beneath. Viburnum in Caprif oliaceae (p. 804). 



hh Leaves entire. 



c Leaves without stipules. 

 Leaves oval to oblong. 



Winter-buds small, with several pairs of opposite scales. 



Fraxinus anomala and Chionanthus in Oleaceae (pp. 765, 777). 

 Winter-buds enveloped by 2 opposite scales. 



Cornus in Cornaceae (p. 712). 



