38 



Key 



Page 



clusters Asclepiodora— 163 



(3) Flowers few in a cup 



formed by 2 bracts... Tithymalus— 125 



s. Sap not milky. 



1. Pods bristly Tragia— 122 



2, Pods not bristly. 



(a) Leaves covered with • 



branched hairs Croton — 120-1 



(b) Leaves smooth. 



1. Leaves less than 1" long. 



o. Petals none Phyllanthus — 120 



p. Petals 5 — 6 Andrachne — 119 



2. Leaves over 1" long, 



flowers not axillary Rumex — 71 



c. Flowers pink, rose or red. 

 m. Flowers composite — See Key to 



Asteraceae Asteraceae— 205 



n. Flowers simple. 



(x) Shrub Castela— 118 



(y) Vine or stems prostrate Krameria— 98 



(z) Plants neither shrubs nor 

 vines. 



a. Petals none. 



1. Pistil with branched, red 



styles Acalypha— 121-2 



2. Styles not branched or red. 

 (m) Stems sheathed at 



joints Persicaria — 71 



(n) Stems not sheathed at 



joints Rivina — 72 



b. Petals 4. 



m. Petals distinct or nearly 

 so (Sepals in Rivina and 

 Persicaria are pink. Find 

 under petals none). 



1. Leaves small, fleshy Portulaca— 76 



2. Leaves not fleshy. 



(m) Stamens 8 Gaura— 150-1 



(n) Stamens numerous, 



plants prickly . Argemone— 83 



c. Petals or lobes of corolla 5 or 



more. 



