112 KEY TO PLANTS. 
cate or contorted in aestivation. Disc 
present. Anthers 2-celled. Styles 2-4. 
Ovule in each cell 1. Euphorbiaceae. 
(4) Flowers hermaphrodite, very rarely poly- 
gamous. 13. 
13 (2) Corolla-lobes valvate in aestivation. 
Stamens 5. Ovule in each cell 1. 
Shrubs or trees. Anthers 2-celled. 
Stigma 1. Ampelideae. 
(6) Corolla-lobes contorted -imbricate in 
aestivation. Stamens 10 or more, rarely 
5, but then ovules in each cell 2 or more. 
14, 
14 (az) Segments of the calyx imbricate in the 
young bud. Ovary 2-4- (nearly always 
3- ) celled. Filaments free or united at 
the base only. Resinous trees or climb- 
ing shrubs. Calyx enlarged in fruit. 
Anthers 2-celled. Ovules 2. Tropics of 
the Old World. Dipterocarpeae. 
(4) Segments of the calyx valvate in the bud. 
Ovary usually 5- or more-celled, rarely 
2-4-celled, but then filaments united to 
the middle or beyond. Filaments always 
united more or less. 15. 
15 (a) Anthers 2-celled, rarely the cells confluent 
at the top, in this case ovary stalked. 
