FAMILY KEY II 



Q. Corolla none or of separate petals. 



R. Ovary and fruit superior. GROUP ii (p. i8) 



RR. Ovary and fruit inferior. GROUP 12 (p. 20) 



QQ. Corolla of united petals. 

 ■ S. Plants with milky juice. 

 T. Ovaries distinct but their styles and stigmas united, carpels 

 later separating into 2 distinct fruits; stamens mostly monadel- 

 phous; pollen united into waxy masses. Asclepiadaceae (p. 181) 

 TT. Carpels quite distinct even in flowering; stamens distinct; 

 pollen of simple grains. Apocynaceae (p. 181) 



SS. Plants without milky juice. GROUP 13 (p. 20) 



HH. Leaves alternate or all basal. 



U. Leaves compound. GROUP 14 (p. 21) 



UU. Leaves simple. 

 V. Plants without green color; either white or yellow or red or brown. 



GROUP IS (p. 23) 

 VV. Plants with green color, although also often with other colors present. 

 W. Petals none, but calyx often petal-like. GROUP 16 (p. 23) 



WW. Petals present, distinct to base. 

 X. Stamens many, at least more than 10 and twice as many as petals. 



' GROUP 17 (p. 2S) 



XX. Stamens 10 or fewer, or if more not exceeding twice the number of 



petals. GROUP 18 (p. 26) 



WWW. Petals present, more or less united. GROUP 19 (p. 27) 



GROUP 3 — Trees and shrubs with opposite leaves 



A. Leaves compound. 

 B. Plants vinelike, climbing by their petioles; fruit a head of akenes with plumose 

 tails. Clematis in Randnculaceae (p. 95) 



BB. Plants not vinelike, not at all climbing; fruit not as above. 

 C. Leaflets entire or very nearly so; fruit i-winged. Oleaceae (p. 178) 



CC. Leaflets serrate or toothed; fruit either 2-winged or a berry. 

 D. Leaflets serrate with close regular equal projections; fruit a berry, not winged. 



Sambucus in Caprefoliaceae (p. 212) 



DD. Leaflets toothed or lobed with irregular unequal projections; fruit dry, 



2-wiuged. ACERACEAE (p. 148) 



AA. Leaves simple. 



E. Leaves palmately veined, or with 3 or more large veins from the base. 

 F. Vines, climbing by tendrils. Vitaceae (p. 150) 



FF. Not vines, erect or spreading. 

 G. Leaves palmately lobed. 

 H. Fruit a red drupe, not winged; flowers in cymes ; shrubs 6-30 dm. high. 



Viburnum in Caprifoliaceae ^p. 212) 

 HH. Fruit dry, 2-winged; flowers in racemes or fascicles; shrubs or trees. 



ACERACEAE (p. 148) 



GG. Leaves not palmately lobed, although sometimes coarsely dentate. 

 I. Leaves acute; stipules none; petals distinct to base; fruit a capsule. 



Hydrangeaceae (p. 123) 



