1G2 



MANUAL OF BOTANY 



Bosemary {fig. 312) and Germander (Teucrium) {fig. 311) ; and 

 the loweT lip of three petals, which are also either entire as in 

 the Eosemary {fig. 312), or bifid as in some species of iam-mm, 

 ortrifidasin Galeobdolon {fig. 313). When «, labiate corolla 



Fig. 310. 



Fig. 311. 



Fig. 312. 



Fif/. 310. Ringent or gaping corolla of the Dead-nettle 



(LamiuM album), stowing the entire upper lip. Fig. 



311. Back view of the flower of a species of Teuciium, show- 

 ing the bifld upper lip of the corolla. Fig. S12. Flower of 



the Bosemary (^Rosmarinus) with upper lip divided. 



Fig. 313. Fi'ont view of the labiiitc corolla of (?n/L-oi»do;on, 

 with triftd lower lip. 



has its upper lip much arched, as in the White 

 Dead-nettle {fig. 310), it is frequently termed 

 ruujent or gaping. The labiate corolla gives 

 the name to the natural order Labiatffi, in the 

 plants belonging to which it is of almost uni- 

 versal occurrence. It is found also in certain 

 plants belonging to some other orders. 



2. Personate or Maslced. — This form of corolla resembles 

 the labiate in being divided into two lips, but it is distinguished 

 by the lower lip being approximated to the upper, so as to close 

 the orifice of the tube or throat. The closing of the throat is 

 caused by a projection of the lower lip called the palate {fig. 

 314). Examples occur in the Snapdragon (fig. 314) and the 

 Toadflax {fig. 315). In the species of Calceolaria the two lips 

 become hollowed out in the form of a slipper ; hence such a 

 coroUa, which is but a slight modification of the personate, is 

 sometimes termed calceolate. 



3. Ligulate or Strap-shaped.— It what would otherwise be a 

 tubular corolla is partly split open on one side, so as to become 

 flattened like a strap above {figs. 316 and Bi7), it is called ligulate 

 or strap-shaped. This kind of corolla frequently occurs in the 

 florets of the Compositae, either in the whole of those consti- 



