SHORT-STEMMED PLANTS 



51 



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

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



FIG. 45. Roots, rootstocks, and 

 leaves of Iris 



FIG. 44. Rootstock of cotton grass (Eriophorum) 



the clovers, and black medick (Medicago) , 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 



