Flora of Denver. 35 



269. Echinospermum Redowskii LEHM. var. occidentale 

 WATSON. (BEGGAR-LICE.) Easily known by the small, light 

 blue flowers and the small sharp-awned burs. Very common 

 on the plains. 



270. Krynitzkia crassisepala TORR. & GRAY. Diffusely 

 branching, round and becoming a tumble weed, white with 

 bristly hairs, very rough, calyx becoming thick at the base and 

 inclosing the nutlets; one is smooth and the rest are white, 

 warty. On the plains. Summer. 



271. Krynitzkia Pattersoni GRAY. Branches more slen- 

 der. Flowers much smaller, calyx not so thickened, akene us- 

 ually only one, smooth. Similar to the above in other char- 

 acteristics. North Denver. Summer. 



272. Krynitzkia Jamesii TORR. White hairy with close 

 hairs which become bristly and spreading when the fruit is 

 ripe. Flowers with yellow appendages in the throat, nutlets 

 narrowly margined, smooth and shining, flattened on top in 

 two pairs. North Denver, on the plains. Summer. 



273. Krynitzkia virgata PORTER, Tall and columnar, 

 blooming from near the base of the simple stem, flowers clus- 

 tered in the axils of the leaves, white corollas with ten small 

 scales within the tube, very bristly, especially when old. Along 

 the Platte and Cherry Creek. Summer. 



274. Mertensia lanceolata DC. (BLUEBELLS.) Glaucous, 

 branching from the base, flowers in a close panicle which be- 

 comes loosely spreading with age, corolla blue. Clear Creek 

 near Berkeley. Along the Platte near Overland Park. Spring. 



275. Lithospermum pilosum NUTT. Reported from near 

 Denver by Dr. Smith and B. H. Smith in the Flora of Colo- 

 rado of. Parry and Coulter. 



276. Lithospermum hirtum LEHM. Found near Denver 

 by Dr. Smith. 



