FAMILY KEY 1 7 



00. Stamens 4-10; pistil only i. 

 Q. Flowers solitary, terminal or in the axils, red; stamens 10; leaves 

 lanceolate, petiole and the veins beneath red-hairy. 



Cladothamnus in Ericaceae (p. 171) 

 QQ. Flowers in clusters, white or blue; stamens 4-5; leaves not as above. 



Rhamnaceae (p. 149) 

 NN. Petals more or less united into i piece. 

 R. Ovary and fruit 2-celled; corolla rotate; fruit a red or blue berry. 



Solatium in. Solanaceae (p. 197) 



RR. Ovary and fruit 3-s-ceIled; corolla campanulate to um-shaped, 



or when rotate the fruit dry. Ericaceae (p. 171) 



MM. Ovary inferior. 



S. Petals distinct; twigs not 4-angled nor conspicuously green; stamens 20. 



Malaceae (p. 132) 



SS. Petals more or less united into i piece; twigs somewhat 4-angled and 



dark-green; stamens 10 or fewer. Vacciniaceae (p. 174) 



GROUP 9 — Dicotyledonous herbs with compound leaves 

 either opposite or in whorls 



A. Plants submerged or floating; leaves dissected into capillary or very narrow seg- 

 ments. 

 B. Leaves 5-12 in a whorl; leaf segments often with some teeth and thus stag- 

 hom-like. Ceeatophyllaceae (p. 95) 



BB. Leaves alternate or opposite or not over 4 in a whorl; leaf segments without 

 teeth, not stag-horn-like. 



C. Leaf segments all pinnately arranged on the leaf axis; leaves without bladders. 



Myriophyllum in Haloragidaceae (p. 162) 

 CO. Leaves repeatedly dichotomous; leaf segments not pinnately arranged on the 

 leaf axis; leaves often with bladders. Ulricularia in Pinguiculaceae (p. 210) 

 AA. Plants either not growing in water, or else their leaves divided into wider seg- 

 ments or leaflets. 

 D. Petals distinct. 



E. Pistils several, in fruit each with a plumose tail 2.5-5 cm. long; leaflets not 

 terete; plants often somewhat vining. Clematis in Ranunculaceae (p. 95) 

 EE. Pistils 1-2, without plumose tail even in fruit. 

 F. Leaves sessile, divided into terete fleshy segments from the base, thus ap- 

 pearing to be whorled; carpels 5, united; ovary superior, i-celled; sepals 4-6 

 mm. long. Spergula in Caeyophyllaceae (p. 90) 



FF. Leaves evidently not whorled; leaf segments not terete; carpels 2, loosely 

 connected, each i-celled; ovary inferior; sepals less than 4 mm. long. 



Umbellaceae (p. 1O3) 

 FFF. Leaves piimately compound, not whorled; leaf segments not terete; carpels 

 5, united, each i-celled; ovary superior; sepals 2-8 mm. long. 



Erodium in Geraniaceae (p. 143) 

 DD. Petals united at least at the base. 

 G. Ovary superior or mainly so. 

 H. Leaves whorled. Pedicularis in Scrophulariaceae (p. 198) 



HH. Leaves opposite. 



jr. A R. EL. FL. — 2 



