22 
KEY TO THE FAMILIES 
Woody vines climbing by tendrils; ovary 2-celled. 
V ITACEAE, p. 74. 
Stamens 4 to 9. 
Leaves palmately compound; style 1; fruit a dehiscent pod. 
Sapindaceae, p. 74. 
Leaves simple; styles 2; fruit a double samara.... 
Aceraceae. p. 74. 
Filaments united into a tube; petals 5 or 6; pistil 1 ; leaves compound. 
Meliaceae, p. 69. 
2. Ovary inferior (more or less adherent to the calyx). 
Petals 5 or more. 
Petals 5. 
Stamens as many as or more than the petals. 
Stamens more numerous than the petals. 
Fruit a pome ; trees or shrubs. Rosaceae, p. 88. 
Fruit a 1-celled capsule opening at the top; herbs. 
Loasaceae, p. 82. 
Stamens as many or twice as many as the petals (Whipplea 
has 8 to 12 stamens) ; ovary rarely free, 2 to 5- 
celled, becoming a capsule or berry..., 
Saxifragaceae, p. 85. 
Stamens as many as the petals and 
Opposite them; petals hooded; shrubs. ...Ceanothus, p. 76. 
Alternate with them; flowers in umbels or heads; herbs. 
.Styles 5; petals not indexed at tip; fruit berry-like; 
stems solid. Araliaceae, p. 112. 
Styles 2; petals indexed at tip; fruit splitting into 2 
one-seeded carpels; stems commonly hollow...., 
Umbelliferae, p. 113. 
Petals 5 to 7; stamens numerous; fruit many-celled, fleshy. 
Punicaceae, p^ 107. 
Petals 4. 
Stamens 4 ; flowers small, in cymes, or if in a head, surrounded by 
conspicuous petal-like bracts ; trees or shrubs.;__ 
CORNACEAE, p. 111. 
Stamens 8, rarely 4; flowers mostly showy, in spikes or racemes or 
solitary ; herbs. Onagraceae, p. 108. 
III. SYMPETALOUS DIVISION. Calyx and corolla both 
present; corolla with the petals united into a cup or tube, at least 
at base. 
A. Ovary superior (free from the calyx). 
1. Corolla regular. 
a. Anthers opening by a hole at the top. 
Stamens free from the corolla; ovary 3 to 10-celled......ERiCACEAE, p. 120. 
Stamens inserted on the corolla; ovary 2-celled. Solanum, p. 140. 
