DALLES POCKET GOPHER 



19 



On the ungrazed plot the average density of all vegetation had 

 doubled by 1948, being 31.84 percent as compared with 15.09 percent in 

 1940 (table 3). The density of perennial grasses was 4.56 percent, repre- 

 senting an increase of 7 times the 1940 density. Kentucky bluegrass in- 

 creased from a low average density of 0.06 percent in 1940 to 3.53 per- 

 cent in 1948. None of the other grass species showed much change. 



The total density of perennial forbs or weeds was 26.19 percent, 

 nearlv five times the 1940 density. Most important of those of high 

 forage value were agoseris, bicolor biscuitroot, Oregon checkermallow, 

 longstalk clover, and common dandelion. Species of moderate to low 

 forage value were western yarrow, small bluebell, and American bistort. 



Table 3. — Average density 1 of vegetation, by class and species, on grazed 

 and ungrazed plots of meadow B. gopher-free from 1940 to 1948 



Ungrazed Plot 



Class and species 



1940 



1943 



1945 



1946 



1947 



1948 



Perennial grasses: 



Pet. 



Pet. 



Pet. 



Pet. 



Pet. 



Pet. 



Bentgrass. thin 







0.12 



0.07 



0.03 



0.06 



0.09 



Blnegrass. Kentucky 



0.06 



.55 



1.31 



1.09 



1.06 



3.53 



Bluegrass. Sandberg 

















Brome. mountain 







.03 



.03 



.06 



.06 



.16 



Fescue, red 











(2) 















Xeedlegrass. Lemmon . . 



I 2 ) 



(2) 







.03 



.03 







Oniongrass. little 



.09 



.09 



.06 



.09 



.06 



.06 



Wheatgrass, slender 



.16 



.06 



.06 



.03 



.06 



.12 



Other 



.34 



.34 



.69 



.24 



.41 



.60 









.65 | 



1.19 



2.22 



1.57 



1.74 



4.56 









.19 | 















Annual weeds: 















Collinsia. littleflower .... 



(2) 



.09 



.06 







I 2 i 







Tarweed, cluster 



6.63 



5.91 



3.16 



2.94 



1.19 



.84 



Other 



2.00 



.28 



.56 



.06 





.25 







Total 



8.63 



6.28 



3.78- 



3.00 



1.19 



1.09 







Perennial forbs or weeds: 

















.66 



.66 



3.09 



3.62 



1.56 



2.25 



Aster 







.22 



.16 



.12 



.12 



Biscuitroot. bicolor 



1 .00 



1.06 



2.44 



3.81 



3.19 



3.72 



Bistort. American 



2.22 



3.72 



3.16 



3.94 



2.59 



4.09 



Bluebell, small 



.25 



1.12 



2.53 



2.69 



1.25 



1.53 



Checkermallow, Oregon . . 



.16 



.38 



.44 



.56 



.56 



1.03 



Cinquefoil 







I2i 



.03 



(2) 



(2) 



.12 



Clover, longstalk 



.19 



.88 



3.41 



3.00 



3.56 



4.59 



Dandelion, common 



( 2 1 



.16 



.66 



1.22 



.97 



2.19 



Fleabane 















Groundsel, Columbia 



.06 



.31 



.37 



.25 



.25 



.25 



Penstemon. royal 



.03 



(2) 



,2: 



.03 



.03 



(2) 



Vetch 



.09 



.03 





.09 



.34 



.28 



Violet 



(2) 



.09 



.22 



.22 



.09 



.19 



Wvethia. whitehead 





Yarrow, western 



.84 



.88 



1.78 



1.66 



1.72 



4.97 



Other 



.12 



.58 



1.09 



1.19 



.91 



.86 







Total 



5.62 



9.87 



19.44 



22.44 



17.14 



26.19 







Total, all vegetation 



15.09 



17.34 



1 25.44 



27.01 



20.07 



31.84 



See footnotes at end of table. 



