ELEMENTS OF STRUCTURAL BOTANY. fi? 



united to the top, or nearly so, the corolla 

 will be tubular (Fig. 1:^1).) If the petals 

 are wedge-shaped, they will by their union 

 produce a. Jtnnn'l -shaped corolla. (Fig. 140.) 

 In the campanulate or heU-shaped form, the 

 enlargement from base to summit is more 

 gradual. It the petals are narrowed abruptly 

 into long claws, the union of the claws into a 

 Fig 139 tube and the spreading of the limb at right 

 angles to the tube will produce the r^, 



salver-shaped form, as in Phlox (Fig. ^T; , 



141). The rotate corolla ditYors from X- '' ^ 

 "ibis in baving a verii short tube. The V^|, I -J 

 corolla of the Potato is rotate. 



131. The most> important irreiiidar > 



gamopetalous corollas are tlie li;iulate, , 



which has been fully described in the ^JT 



examination of the Dandelion, and the " 



labiate, of which we found an example in Fig. uo. 

 Catnip (Fig. 5'J). The corolla of Turtle-head (Fig. 

 142) is another example. When a labiate corolla pre- 

 sents a wide opening between the upper and lower hps, 

 it is said to be rin,jent . if the opening is closed by an 



Fig. 141. F.g. 142. m. "3. 



upward projection of the lower Up, as in ToadHax (Fig. 

 143), it is said to be personate, and the projection in 



