ANALYTICAL KEY 



TO THE FAMILIES OF PLANTS INCLUDED IN THIS BOOK, 

 BASED ON THE CHARACTER OF THE LEAVES 



1. Leaves opposite. 

 *Leaves simple. 

 -i-Leaves persistent. 



a Leaves with stipules. 



Leaves entire or sometimes slightly crenate or serrate. 



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

 Leaves obovate, gradually narrowed into the petioles. 



Gyminda in Celastraceae (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, 3'-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. Myrtaceae (p. 693). 



Leaves without glands on the under side. 

 Leaves obtuse or emarginate, rarely acute. 



Leaves green and glabrous beneath, obovate to oblong-obovate, !'-!' long 



(sometimes alternate). Nyctaginaceae (p. 313). 



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



Verbenaceae (p. 787). 



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

 ---*-Leaves deciduous. 



a Leaves without lobes. 

 6 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 rufous-tomentu- 

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

 bb 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). 



