of Denver. 11 



74. Petalostemon violaceus MICHX. (CRIMSON PRAIRIE- 

 CLOVER.) Flowers crimson on a cylindrical spike. On the 

 plains. Summer. 



75. Petalostemon candidus MICHX. (WHITE PRAIRIE- 

 CLOVER.) Flowers similar but white, leaflets more numerous. 

 On the plains. Summer. 



76. Petaloste'mon macrostachyus TORR. Spikes thicker 

 and longer, corolla greenish white. North Denver. Summer. 



77. Amorpha fruticosa L. (FALSE INDIGO.) A shrub with 

 spikes of dark purple flowers blooming in spring Along the 

 Platte. 



78. Glycyrrhiza lepidota PURSH. (LIQUORICE.) Glandu- 

 lar, flowers greenish white, ripe pods brown covered with 

 hooked prickles. Common. 



79. Astragalus caryocarpus KER. (GROUND PLUM.) The 

 earliest Astragalus, with large pink and white flowers and pod 

 like a green plum. On the plains. 



80. Astragalus Canadensis L. Tall and branching, flow- 

 ers greenish white, pods ascending, crowded, two-celled, swollen. 

 Along the Platte. Perrin's meadow. 



81. Astra'galus adsurgens PALL. Rather tall,' violet flow- 

 ers in dense capitate spikes, pod two-celled, cross section obcor- 

 date. Along the Platte 



82. Astra'galus hypoglottis L. Low, with capitate spikes 

 of violet flowers, pod silky with white hairs. Resembles the 

 preceding, but is much smaller and has a villous pod. Along 

 the Platte. 



83 Astragalus Drummondii DOUGL. Tall, white-hairy, 

 corolla white, calyx black-hairy, pods long and hanging, 

 cross section deeply obcordate. Berkeley. 



