106 KEY TO PLANTS. 
base, or sessile stigmas 2 or more. 
Petals imbricate in aestivation. 196. 
192 (a) Leaves stipulate, opposite. Shrubs or 
trees. Calyx valvate in bud. Ovary 
several-celled, with 2 ovules in each cell, 
very rarely l-celled. Tropics. 
Rhizophoreae. 
(4) Leaves extipulate. 193. 
193 (a) Petals induplicate-valvate in aestivation, 
4-5. Ovary 1-celled. Ovules parietal 
or apical. Leafy herbs or shrubs. 
America and Africa. Loaseae. 
(2) Petals imbricate in aestivation, rarely 
open or closed (in the form of a cap). 
194. 
194 (a) Ovary 1-celled, with numerous ovules 
attached to several parietal placentas. 
Succulent plants, usually destitute of 
perfect leaves, rarely provided with 
large and dotless leaves. Petals 6 or 
more. Cacteae. 
(6) Ovary 1-celled, with 2-10 ovules at- 
tached to a basal or central placenta, 
or more frequently  several-celled. 
Plants provided with leaves. 195. 
195 (a) Leaves opposite or verticillate, without 
dots. Anthers dehiscing by 1 apical 
+ 
