POLYPETALAE. 61 
22 (a) Petals valvate in the bud. Ovary imper- 
fectly 2-celled. Shrubs with tendrils. 
Leaves exstipulate. Calyx gamosepal- 
ous. Petals 4-5. Ovules 4, basal. 
Fruit a berry. A mpelideae. 
(4) Petals imbricate in the bud. Ovary per- 
fectly 1-celled. 23. 
23 (a) Sepals 4-5. Petals 4-5. Ovules inserted 
on a more or less globose central placenta 
Shrubs or trees. Leaves exstipulate, 
entire or dentate. Fruit indehiscent, 
1-seeded. Myrsineae. 
(0) Sepals 6 or more. Petals 6. Ovules basal. 
Sepals distinct. Berberideae. 
24 (2) Ovules attached to a sutural placenta (to 
the ventral or dorsal suture of the 
ovary). 25. 
(2) Ovules attached to 2 or more parietal 
placentas. 27. 
25 (a) Sepals and petals together 12. Stamens 
of the same number as the petals, and 
opposite to them, 4, 6, or 8. Flowers 
regular. Sepals distinct, petaloid. Petals 
imbricate. Stamens hypogynous. 
Berberideae. 
(0) Sepals and petals together 6-10. Stamens 
usually more numerous than the petals, 
