42 KEY TO PLANTS. 
62 (a) Flowers polygamous. 63. 
(0) Flowers unisexual. 64, 
63 (a) Leaves simple (entire or dentate) and 
stipulate, or reduced to opposite scales, 
or wanting. Stamens perigynous, 4-5. 
Seeds albuminous. Perianth valvate. 
Rhamneae. 
(6) Leaves compound, exstipulate, alternate. 
Stamens hypogynous, 6-12, very rarely 
4-5. Seeds exalbuminous. 
Sapindaceae. 
64 (a) Ovules descending. Micropyle and radicle 
superior. Leaves usually stipulate. 
Ovary most frequently 3 - celled. 
Ovules usually furnished with a cap- 
shaped funicle. Fruit generally cap- 
sular. Embryo central. 
Euphorbiaceae. 
(2) Ovules ascending. Micropyle and radicle 
inferior. 65. 
65 (a) Stamens 2-3. Flowers in heads or in 2-3- 
flowered axillary fascicles. Fruit a drupe 
with several stones. Embryo straight, 
central. Low heath-like shrubs. Leaves 
exstipulate. Disc 0. Ovary 2-4 celled. 
Europe and North America. 
Empetraceae. 
