40 KEY TO PLANTS, 
female flowers more or less united, of 
the male flowers sometimes distinct, but 
then shrubs with alternate leaves. 55. 
55 (a) Ovules 2. Leaves opposite or verticillate, 
stipulate. Trees. Flowers dicecious. 
Perianth 4-5-partite. Stamens 8-10, 
slightly perigynous. Carpels 4-5, 
Seeds albuminous. Tropical America. 
Siumarubeae. 
(6) Ovule 1. Leaves alternate or exstipulate. 
56. 
56 (a) Leaves stipulate, alternate, nearly always 
compound. Seeds exalbuminous. Herbs 
or shrubs. Carpels 2-4. Rosaceae. 
(0) Leaves exstipulate, simple and entire or 
dentate, usually opposite. Seeds albu- 
minous. Shrubs or trees. Stamens 
perigynous. Filaments short or 0. 
Anthers adnate. Carpels frequently 
immersed in the receptacle. 
Moniniaceae. 
57 (a) Ovule in each cell of the ovary 1. 58. 
(6) Ovules in each cell of the ovary 2 or 
more. 66. 
58 (a) Flowers hermaphrodite. 59. 
(2) Flowers polygamous or unisexual. 62. 
59 (a) Stigma 1, entire or bilobed. Seeds exal- 
