38 THE APPENDAGES TO PLANTS. 



it ultimately and spontaneously detaches itself, and forms 

 a new individual. Bulbs are of two kinds, radical and 

 caulinary. 



If it is situated on the root (F.26, a a) as in the crocus, it is said to 

 be radical; and if upon the stem (F. 27, a a) or branch (or axil of the 

 leaf, as in the tiger-lily,) it is said to be caulinary. 



5. The bud is likewise a species of gem, of an ovate 

 or conical figure, issuing from the axil of the leaves, or 

 from the sides and extremities of the branch, and con- 

 taining the rudiment of future branches, leaves, or fruit ; 

 but noi detaching itself spontaneously from the plant, and 

 forming a new individual. Buds are of three kinds; the 

 leaf-bud, the flower-bud, and the compound-bud. 



The leaf -bud is slender and acute, producing leaves only, as in the 

 peach-tree (F.34, a); ihejlorver-bud, thick and short, containing the 

 flower only, as also seen in the peach-tree (b); and the compound- 

 bud larger than either of the two, producing both the leaf and the 

 flower (c), as in the fruit-buds of the horse-chesnut. 



6. The leaf-stalk, or petiole, is the slender stem-like 

 appendage to a leaf, by which it is connected to the 

 branch. 



In describing the distinctive parts of an expanded leaf, we have 

 pointed out the foot-stalk as an essential part, terminating in the 

 midrib ; for although the leaves of some plants are without, yet the 

 generality are furnished with one. 



The part marked a in the 40th figure, is the foot-stalk of that leaf, 

 and the angle formed by the union of the foot-stalk with the branch. 

 (f ) is botanically called the axilla of the leaf. 



7. The flower-stalk, or peduncle, is that part which 

 supports the flower and fruit upon the branch or stem, 

 but not the leaves. 



