426 BOTANICAL GAZETTE [JUNE 
representing three years of growth: 4" being the terminal bud 
from 1897, & the corresponding one from 1898, while the large 
bud, &, the terminal one of the entire rhizome, will develop in 
the spring of 1899. Z* and Z? indicate the scars of aerial leaves 
borne upon shoots which are terminated by dormant buds, 3 
and 6. The scars left from the scale leaves form narrow dark 
lines on the rhizome, but are very distinct on the short as well 
as on the elongated internodes. In the accompanying drawing 
of a joint of a mature rhizome of Podophyllum (jg. 7), the dis- 
Fic. 7. Part of rhizome; magnified. 
position of the leaves and buds may be seen more plainly. Rh 
and vi represent the anterior and the posterior parts ot the 
rhizome; /-/° indicate the scars from scale leaves, while Z shows 
the scar from a green leaf; B and 4 are buds, terminal and lat- 
eral; y and rare secondary roots. 
As we have stated above, the ramification of the rhizome 
is sympodial, a fact that is readily observed if we examine ji: 7- 
All the scale leaves, excepting the one marked /, are situated 
upon the same axis, terminated by the larger bud, B, which 1s 
purely vegetative and remains dormant. The anterior part of 
the rhizome, Rk, however, which bears a scale leaf, Z, has devel- 
oped from the axil of the scale leaf, /3, in the same manner as the 
smaller bud, 4, in the axil of the scale leaf, /5. But while the 
smaller bud, 4, seldom develops any further, the branch, KA, grows 
