STEMS. 13 



In bulbous plants, such as the hyacinth and tulip, 

 small bulbs ' are formed on the edges of the crown of 

 the root between the scales, which gradually enlarge 

 at the expensq of the scales, are detached, become 

 perfect bulbs, and send up leaves and flower-stalks. 



At |he inner base of the stalk leaves, in some other 

 bulbous plants, as in the tiger lily, and in the flower 

 itself, as in the tree onion, small bulbs 2 grow, which 

 on being thrown off and planted, produce perfect 

 plants. 



Stem bulbs of the tiger lily. 



I am disposed to agree with M. Richard, in consider- 

 ing the small bodies 3 , improperly called seeds, in ferns, 

 mosses, and lichens, as similar to the small stem bulbs 

 of the tiger lily^ inasmuch as they do not contain a 

 complete embryo, as seeds always do. 



As the root and its modifications are, with rare 

 exceptions, always under ground, so the stem 4 is, with 



(l). Popularly, Cloves; in Latin, Adnata, 

 (2) In Latin, Bulbuli ; or Soboles ; or Propagines. 



(3) In Latin, Sporulce. 

 (4) In Latin, Candex, or Axis ascendens. 



