LESSON n.] SLHTKUKANKAN FOllMS : KOOTSTOCKS. 41 



always ju'rcnnials (11) ; tlio siihtcnaiican siioots live ovrr llif first 

 winttT, if not lonj^er, and are proviilccl with vi^rorous buds at every 

 joint. Soinc! of tliese buds grow in spring into upriglit sterns, bearing 

 foliage, to elaborate tiie plant's crude food into nourishment, and at 

 length produee blossoms for repnxhietion by seed; while many oth- 

 ers, fed by nourishment supplied from above, form a now generation 

 of subterranean shoots ; and tliis is repeated over and over in the 

 course of thi; season or in succeeding years. Meanwhile as the sub- 

 terranean shoots increase in number, the older ones, connecting the 

 series of generations into one body, die off year by year, liberating 

 the already rooted side-branches as so many separate plants ; and 

 so on indefinitely. Cutting these running rootstocks into |»ieces, 

 tiierefore, by the hoc or the plough, far from destroying the plant, 

 oidy accelerates the propagation ; it converts one many-branched 

 ])lant into a great number of separate individuals. Even if you 

 divide the shoots into as many pieces as there are joints of stem, 

 eacii piece (Fig. 05) is already a plantlet, with its roots and with a 

 bud in the axil of its scale-like leaf (eitiier latent or apparent), and 

 having prepared nourishment enough in the bit of 

 stem to develop this bud into a leafy stem ; and so 

 a single plant is all the more speedily converted 

 into a multitude. Such plants as the Quick- 

 grass accordingly realize the fable of the Hy- 

 dra ; as fast iis one of its many branches is cut gs 

 oft', twice as many, or more, spring up in its stead. Whereas, when 

 the subterranean parts are only roots, cutting away tiie stem com- 

 pletely destroys the plant, except in the rather rare cases where the 

 root produces adventitious buds (08). 



99. The more nourishment rootstocks contain, the more readily do 

 separate portions, furnished with buds, become independent j)lants. 

 It is to such underground stems, thickened with a large amount of 

 starch, or some similar nourishing matter stored up in their tissue, 

 that the name of r/iizojua or rootstock is commonly applied ; — such, 

 for example, ivs those of the Sweet Flag or Calamus, of Ginger, of Iris 

 or Flower-de-luce (Fig. l.'?3), and of the Solomon's Seal (Fig. Of)). 



lUO. The rootstocks of the common sorts of Iris of the gardens 

 usually lie on the surface of the ground, partly uncovered ; and 

 they l)ear real leaves (Fig. 133), which closely overlap eacii other; 



IMC r..'>. A picrp of the running rootstock of tlo Pcpporniint, with its node or joint, and 

 an .-vxillary ImkI ready to grow. 



