AND ITS DIFFERENT KINDS, 111 



having, as mentioned above, so many pairs 

 of roots, the growth of some of which is 

 always going on, has hitherto not been 

 found to survive transplantation at all. 



Iris tuberosa, Sm. FL Grcec. Sibth. U 41, 

 has a root very analogous to these just 

 described, but I.jlorentina and I germa- 

 nka, t. 39 and 40 of the same work, have 

 anore properly creeping roots, though so 

 thick and fleshy in their substance, and 

 so slow in their progress, that they are 

 generally denominated tuberous. 



6. Radix bulbosa. A Bulbous Root, pro- 

 perly so called, is either solid, as in Crocus, 

 Lvia, Gladiolus, Sec; tunicate, tunicata, 

 composed of concentric layers enveloping 

 one another as in Allium, the Onion tribe ; 

 or scaly, consisting of fleshy scales con- 

 nected only at their base, as in LUium, 

 the White or Orange Lily. The two 

 latter kinds have the closest analogy with 

 leaf-buds. They are reservoirs of the vital 

 powers of the plant during the season when 

 those powers are torpid or latent, and in 

 order to perform the functions of roots, they 

 first produce fibres, which are the actual 



