ihe Sais 
Ut 
POLYPETALAE. 91 
Sepals imbricate. Petals 5. Seeds 
albuminous. Madagascar. Chlaenaceae. 
(b) Sepals 4-5. Stamens inserted on the 
calyx-tube, or on a cushion-shaped disc, 
or outside of a cup-shaped disc. 142, 
142 (a) Stamens inserted upon a cushion-shaped 
dise. Ovules usually more than 2 in 
each cell. Leaves generally alternate. 
Flowers usually racemose. Segments of 
the calyx valvate, rarely slightly imbri- 
cate. Seeds albuminous. Tilivaceae. 
(6) Stamens inserted on the calyx-tube, 
rarely at the base of a cup-shaped disc. 
Ovules in each cell of the ovary 2, pen- 
dulous or descending. 143. 
143 (2) Leaves alternate. Segments of the 
calyx imbricate in the young bud. 
Seeds exalbuminous. Petals contorted 
in bud. Segments of the calyx enlarged 
in fruit, usually wing-like. Tropics of 
the Old World. Diupterocarpeae. 
(4) Leaves opposite. Segments of the calyx 
- valvate in the bud. Seeds albuminous. 
Flowers axillary, solitary or fascicled. 
Petals laciniate. Tropics and South 
Africa. Rhizophoreae. 
144 (a) Leaves alternate, unequally pinnate, very 
