DRY GRASSLAND OF A MOUNTAIN PARK 



253 



where high winds no doubt cause too great transpiration and too 

 much drying of the soil (fig. 4). In such places there is hkely 

 to be much of the Comandra and of the species of Antennaria, 

 which seem better able to withstand dryness (fig. 2). The 

 flowering scapes of the loco are here about 2 dm. high, while at 

 lower altitudes they are more often 3 dm. Of the species of 

 Antennaria only A. anaphaloides is of sufficient height to produce 



.A: 







Fig. 2. A patch of the Muhlenbergia-Antennaria society on a west-sloping 

 morainic knoll. The light-colored plants with white inflorescences are Anten- 

 naria anaphaloides. 



much effect on the landscape. The Comandra, no matter how 

 abundant it may be in places, is not conspicuous, since the dull, 

 greenish-white flowers are small. The brilliant yellow blossoms 

 of Sedum form a striking feature of those societies in which 

 this plant occurs in abundance; it is present to some extent 

 nearly everywhere. Eriogonum umbellatum, the "sulphur flower," 



