46 



Key 



Page 



p. Flowers % — %" across Abutilon— 134 



3. Petals numerous. 



(1) Plants with large float- 

 ing leaves Nymphaea— 82 



b. Flowers pink, rose or red. 



m. Flowers composite — See Key to 



Asteraceae 



n. Flowers simple. 



(x) Shrubs Cercis— - 96 



(y) Vines Ipomoea — 164-5 



(z) Plants neither shrubs nor 

 vines. 



(a) Petals none. 



(1) Pistil with branched red 



styles Acalypha— 121 



(b) Petals or lobes of corolla 4 

 or 5. 



r. Petals distinct or nearly so. 



1. Fruit with a long beak. Erodium— 112 



2. Fruit not beaked. 



(m) Flowers pink or rose. 



(1) Leaves ovate or 



broader Pavonia—137 



(2) Leaves narrower 



than (1) Spharalcea— 137 



(n) Flowers red. 



(1) Petals wine-colored. Callirhoe— -135 



(2) Petals scarlet. 



o. Pods feathered on 



the angles Hermarmia— 138 



p. Fruit smooth, scar- 

 let Malvaviscus — 137 



s. Petals united. 



(1) Sap milky Lobelia— 204 



(2) Sap not milky Castilleja— 193 



c. Flowers white. 



m. Flowers composite — See Key to 



Asteraceae Asteraceae — 205 



n. Flowers simple, 

 (x) Shrubs. 



a. Branches thorny . Crataegus — 91 



b. Branches not thorny. 



