SHORT-STEMMED PLAXTS 



51 



shepherd's purse, and the like, with radiating leaves, are known 

 as rosette plants, while those with radiating stems, like knotgrass, 



FK.. 45. Roots, rootstocks. and 

 leaves i if Iris 



FIG. 44. Rootstock of cotton grass (Eriophorum) 



the clovers, and black medick(J/{v^V>/</0), are known as mat plants. 



Any plant which can grow in safety under the very feet of 



grazing animals will be especially likely to make its way in 



