Key 



39 



Page 



r. Petals distinct or nearly so. 



1. Leaves small, fleshy Portulaca — 76 



2. Leaves not fleshy. 



(a) Plant thistle-like Argemone — 83 



(b) Plant not thistle-like. 



(1) Petals dull-scarlet. Hermannia— 138 



(2) Petals pink to sal- 

 mon Spharalcea — 137 



s. Petals united. 



1. Sap milky, corolla scarlet Lobelia — 204 



2. Sap not milky. 



(m) Leaves entire Phlox — 168 



(n) Leaves finely divided Gilia — 169 



d. Flowers mainly white. 



m. Flowers composite — See Key to 



Asteraceae Asteraceae — 20 5 



n. Flowers simple, 

 (x) Shrubs. 



1. Branches thorny. 



(a) Petals distinct. 



(1) Fruit a plum Prunus— 92 



(2) Fruit a small apple. Crataegus— 91 



(b) Petals united at base... Bumelia— 158 



2. Branches not thorny. 



(a) Petals distinct or nearly 

 so. 



1. Stamens numerous Prunus— 92 



2. Stamens not numerous. 



(m) Leaves 2 — 5" long Rhamnus — 131 



(n) Leaves 1— 2y 2 " long Ilex— 128 



(b) Petals united Brayodendron — 158 



(y) Vines or stems prostrate. 



1. Corolla wheel-shaped . . Chamaesaracha— 170 



(z) Plants neither shrubs nor 

 vines. 



1. Petals or lobes of corolla 3 or 

 none (Polygala has 2 white 

 petal-like sepals, in addition 

 to 3 petals). 



a. Sap milky . ... Euphorbia — 124-6 



b. Sap not milky. 



