92 KEY TO PLANTS. 
rarely 1-3-foliolate. Sepals valvate in 
bud, united at the base or beyond. 
Trees. Stamens more or less perigynous. 
Ovary 2-4-celled, with a very short style 
and a lobed stigma. Tropics of the Old 
World. Burseraceae. 
(2) Leaves opposite, very rarely alternate 
but abruptly pinnate. Sepals imbricate 
in bud, free or united at the base, 4-5. 
Filaments usually each with a scale on 
the inner side. Zygophylleae. 
145 (a) Styles 2. Stamens 8-12. Leaves usually 
opposite. Saxifrageae. 
(0) Styles 5. Stamens usually numerous. 
Leaves alternate. Rosaceae. 
146 (a) Leaves simple. 147. 
(182) (6) Leaves compound.* 160. 
147 (a) Leaves opposite or verticillate. 148, 
(5) Leaves alternate or (all) radical. 154. 
148 (2) Stamens fewer than the petals, 3. Leaves 
undivided, not dotted. Sepals valvate. 
Anthers dehiscing by longitudinal or 
transversal slits. Style undivided. Ov- 
ary immersed in the dise, 3-celled. 
Celastrineae. 
* Compare some Sazxifrageae, herbs or undershrubs 
with dissected leaves and 2 free styles. 
