f ~ 4 
29 ELEMENTARY BOTANY | 
_ 4. The bud arises in the axil of 
similar brown scales at the top of the 
stem, and consists of © 
(a) a succession of sheathing 
leaves ; 
(b) a few green leaves ; 
(c) floral leaves enclosed in the 
sheath. 
Generally a corm contains many 
buds, and the previous year’s corm, 
very much shrunk, often remains 
attached to its under surface. : 
wager or . A tuber ‘arises ag am 
Potato. swelling on a branch, — 
which is : ee ! 
Fic. 25.—Corm or Crocus, formed . in 
Lonerrupinat Section. _— the axil of | 
c, corm of previous year; the leaf. but 
7, roots; st, stem; <¢.8c, ° : foe 
covering scales ; sh./, sheath- makes its 
ing leaves ; jl, green leaves ; way under- 
flor, floral leaves. 


ground. It 
this underground structure be made 
to grow in the light, it will bear 
ordinary green leaves and produce 
no tubers. The tuber bears on its 

Fic, 27.—SEEDLING OF 
PoraTo. 
i ce” ee tee Lie rela all na eee eae 

t, tuber ; c, cotyledon ; st, 
| | stem ; fl, foliage leaves ; 7% 
Fic, 26.—Tuser or Potato. Foot es : . 
e, eyes; s¢.l, scaly leaf ; ae, aerial shoot. 
