1899] PODOPHYLLUM PELTATUM 425 
the rhizome, which is here represented by the short internodes of 
the preceding year’s growth, with scars remaining of the first scale 
leaves, #-/3, and the first aerial green one, Z. The direction of this 
| little rhizome is still vertical, and the arrangement of the leaves is 
strictly alternate, in conformity with those of the previous year. 
By examining the leaf axils of these two stages (figs. 3 and 
4), we found no buds, excepting a very minute one in the sheath- 
ing base of the aerial leaf (fig. 5). This bud 
being terminal and the only one on the rhizome 
continues its growth for several years, develop- 
ing successively a few scale leaves and a single 
green aerial one at the same time. It is not 
until the plant has reached an age of four or 
five years, that a lateral bud appears in the 
axil of one of the scale leaves and grows out io: wat 
a a horizontal shoot with elongated inter- petiole ofa leaf from 
fodes. From this period the terminal bud of 4 young pie, See 
ett — to grow, but remains ang AE fies 
y to push out should the  jaia open to show 
lateral shoot become injured. the bud; magnified. 
Fic. 6. Rhizome of full-grown specimen of P. peltatum; natural size. 
Be he When the lateral bud develops, the direction of the rhizome 
_ “mes changed from vertical to horizontal, and the original 
| sonopodium passes over into a sympodium. The accom- 
ye figure (fig. 6) shows the rhizome of a mature plant, 
