THE AMERICAN BOTANIST 55 



82. Sporoholus pungens Thtirb. A grass with sharp 

 tipped leaves ; eaten by stock. 



83. Pentstefiion anibigiiiis Torr. Flowers pale bluish- 

 white and produced so abundantly as to appear like small 

 clouds on the desert sands. This is absolutely the finest flower 

 on the desert. 



84. S poroboliis flc.vuosiis (Thmh.) Rydb. A tall grass 

 on the range; with 82 and 85, about the only grasses. 



85. Bouteloua hirsuta Lag. Black grama; the most 

 important pasture grass. 



86. Oenothera Janiesii T. and G. The great yellow 

 evening primrose. 



88. Machaeranthera tanacetifolia Nees. An aster with 

 finely cut leaves from Laguna Canyon. Flowers deep violet, 

 very attractive. 



89. Lcpidiiiui alyssoidcs Gray. Laguna Canyon. 



90. Tradescantia scopuloruiu Rose. Common on the 

 range. 



91. Arctostaphylos manzanita Parry. Quite common. 

 Bark reddish, like mahogany. 



92. Jimiperiis communis siberica (Burgsd.) Rydb. 

 A juniper from the summit with low spreading branches. 



93. Colcogyne ramosissinia Torr. This is the stubbiest 

 and most pestiferous plant to travel through that I have ever 

 found. Even the mules turn out for it. In many places the 

 desert is thickly set with it, making progress very tiresome. 



96. Sphaeralcea cuspidata (Gray) Brit. Mallow. 

 Abundant on the range with flowers combined of red orange 

 and yellow. 



97. Ranunculus cymbalaria Pursh. Red Lake, Marsh 

 Pass, Laguna Canyon, and on the road to Farmington. 



