82 



STRUCTURAL BOTANY. 



points. In the corin, the analogy is far more evident, for the .ixis is less excessive and 

 the scales more manifest; and lastly, in the bulb the analogy is complete, or overdore, 

 the scales often becoming excessive. 



270 



267, Corm of Crocus, with new ones forming above. 268, Vertical section of tlv ame. 269, Section 

 Df Imlb of Hyacinth, with terminal scape and axillary bulblet. 270, Section of bu.D of Oxalis violacea, 

 v ith axillary scapes. 



Remeio. 230. Give carefully the definition. Which forms are undeveloped? Which 

 partly developed ? 231. Define the Creeper. Its two classes. How is Witrh grass best 

 cultivated? Usefulness of such stems. What is sward ? 233. Define Root-stock ? Show 

 its manner of growth by the figure (258). 235. What is the premorse Root-stock? 236. 

 The stem of Clover, Asparagus, etc., in Winter is what? 237. What is a Tuber? Show 

 by fig. 260 how it grows. 239. Define Corm. Show by fig. 263 how it grows. 240. De- 

 scribe the bulb. Show its growth by fig. 266. Varieties. 243. Point out the gradation 

 in fciber, corm, and bulb. 



CHAPTER XVIII. 



THE LEAF-BUD. 



244. It is but a step from the study of the bulb to that of the 

 leaf-bud. Buds are of two kinds in respect to their contents 

 the leaf-bud containing the rudiments of a leafy stem or branch, 

 the flower-bud containing the same elements transformed into the 

 nascent organs of a flower for the purpose of reproduction. 



245. The leaf-bud consists of a brief, cone-shaped axis with 

 a tender growing point, bearing a protecting covering of imbri- 

 cated scales and incipient leaves. 



246. The leafy nature of the scales is evident from a careful 

 inspection of such buds as those of the Rose, Currant, Tulip-tree, 



