48 



Key 



Page 



plants terrestial . Anemone — 79 



2. Flowers 2 — 3" across, 



plants aquatic Castalia— 81 



2. Petals united. 



r. Leaves armed with sting- 

 ing hairs . Jatropha— 123 



s. Leaves not with stinging 

 hairs. 



1. Leaf-stalks united to 



blade in the center Hydrocotyle — 152 



2. Leaf-stalks not united 



as in 1. 

 (m) Flowers tubular. 



(1) Flowers in coiled 



racemes Onosmodium — 176 



(2) Flowers not in 



coiled racemes Martynia — 195 



(n) Flowers not tubular. . . Marilaunidium — 167 

 d. Flowers blue to purple, 

 m. Flowers composite — See Key to 



Asteraceae Asteraceae — 205 



n. Flowers simple. 



(x) Vines or stems prostrate. 



(a) Sap milky Vincetoxicum— 164 



(b) Sap not milky 



1. Flowers fringed Passiflora— 140 



2. Flowers not fringed. 



(1) Flowers trumpet-shaped Ipomoea—164-5 



(2) Flowers tubular, 2- 



lipped Antirrhinum — 191 



<y) Plants neither vines nor 

 shrubs, 

 r. Flowers spurred. 



<1) Plants 10—24" tall Delphinium— 78 



(2) Plants stemless Viola-— 139 



s. Flowers not spurred. 



1. Plants thistle-like Eryngium — 153 



2. Plants not thistle-like. 



a. Flowers tubular Martynia— 195 



b. Flowers not tubular. 

 <m) Flowers with yellow 



