104 KEY TO PLANTS. 
186 (2) Anthers dehiscing at the apex by 1-2 
pores, rarely by 1 slit. Leaves usually 
opposite and with several longitudinal 
ribs. Stamens as many, or twice as 
many, as petals. Connective usually 
appendaged. Ovary 1-celled, with a free 
central placenta, or several-celled. Seeds 
exalbuminous. Melastomaceae. 
(4) Anthers dehiscing by two longitudinal 
slits.* 187. 
187 (a) Ovary 1-3-celled. Petals imbricate or 
open in aestivation. Seeds albuminous. 
Ovary 1-celled, with several or numerous 
parietal ovules, or several-celled, with 
numerous axile ovules. Stamens as 
many as petals. Saxifrageae. 
(4) Ovary completely or incompletely 4-5- 
celled. Petals contorted in aestivation. 
Seeds exalbuminous. Calyx valvate in 
aestivation. Onagrarieae. 
188 (a) Stamens as many as the petals and op- 
posite to them, 6-7, rarely 4-5 or 8. 
Shrubs or trees. Flowers hermaphrodite. 
* Compare Celastrineae, the ovary of which is not dis- 
tinctly inferior, but frequently partially immersed into the 
disc. They have an imbricate calyx, and a several-celled 
ovary, with 2 or few ascending ovules in each cell. 
