AND ITS DIFFERENT KINDS. 113 



Bot. t. 1071, as well as to numerous beau- 

 tiful productions of the Cape of Good 

 Hope. ' 



7. Radix articulata^ or gramdaia, f. l6, A 

 Jointed or Granulated Root agrees very 

 much with those described in the last sec- 

 tion. The Oralis Acetosella, Wood Sorrel, 

 Engl. Bot. t. 762, and Saxifraga granu- 

 lata, White Saxifrage, t. 500, are instances 

 qf it. The former has most affinity with 

 scaly bulbs, the latter with solid ones. 



It is evident that fleshy roots, whether of 

 a tuberous or bulbous nature, must, at all 

 times, powerfully resist drought. We have 

 already mentioned, p. 41, the acquisition of 

 a bulb in Phleiim pratensCy E?igL Bot, 

 t. 1076, whenever that grass is situated in a 

 fluctuating soil, by which its vital powers are 

 supported while the fibrous roots are deprived 

 of their usual supplies. In this state it be- 

 comes the Phlcum nodosum of authors ; but 

 on being removed to a thoroughly wet soil, 

 it resumes the entirely fibrous root, and luxu- 

 riant growth, of Bh. prateme. I have also 

 found Alopecurus geniculatus, t, 1250, (an 



I 



