ARTIFICIAL KEY TO THE FAMILIES. xlvii 



Calyx 4-10-toothed ; petals 4-10, linear ; style 

 elongate ; stigma large, capitate 



LXXX. ALANGIACEAE. 



Calyx 4-5-lobed or truncate ; petals 4-5, Ovate; 

 style short, small, not capitate 



LXXXI. CORNACEAE. 



Ovary syncarpous, usually free from the calyx, occa- 

 sionally inferior or half inferior, 1 -celled, placentas 3-5, 

 parietal ; flowers regular, 3-9-merous ; ovules many ; 

 styles usually distinct : 



Flowers bisexual; or if 1 -sexual, then trees with 

 milky sap, palmately lobed leaves and superior 

 ovary : 



Small herbs ; leaves beset with glandular hairs ; 



styles quite distinct LIX. DROSERACEAE. 



Erect or climbing woody herbs, shrubs or trees 

 without glandular hairs : 



Plants climbing by means of tendrils ; flowers 

 often with a distinct corona between petals and 



stamens LXXI. PASSIFLORACEAE. 



Erect undershrubs, shrubs or trees without 

 tendrils ; flowers without corona : 



Flowers bisexual ; leaves entire or rarely 

 pinnately lobed ; sap watery : 

 Trees or large shrubs ; leaves entire, often 

 bearing pellucid glands ; sepals and petals 



similar, petals LXIX. SAMYDACEAE. 



Undershrubs ; leaves entire or pinnately 

 lobed, not pellucid, but usually bearing 

 2 glands at the base ; sepals and petals very 



dissimilar LXX. TURNERACEAE. 



Flowers dioecious ; leaves palmately lobed, 

 subpeltate ; sap milky 



LXXII. CARICACEAE. 



Flowers 1 -sexual or polygamous ; ovary inferior ; 

 calyx-teeth minute ; petals ; large trees 



LXXIV. DATISCACEAE. 



Stem fleshy, flat, articulated, usually bearing large thorns 

 and smaller spines ; leaves minute ; lobes of calyx, petals 



and stamens numerous LXXVI. CACTACEAE. 



Petals almost always and sepals very often united, corolla 

 rarely absent ; stamens almost always fewer than 12, usually 



