LECT. X.] LEAVES THE PETIOLE. 515 



(amplexans), 7^; or wraps completely around it, 

 and then is termed sheathing (vaginans), as in the 

 Grasses. In some cases the petiole is inflated (in- 

 flatus), and the plants in which this occurs being 

 aquatic, it serves to float the leaf, as in Trapa 

 natans, 73, &c. 



The appendages of the petiole are not nume- 

 rous. A footstalk is said to be winged (alatus), 

 when it has on each side of it a portion of the 

 expansion, isolated from the rest, as in the Orange 

 tribe, Citrus, 74. But there are leafy appen- 

 dages of a distinct character, denominated sti- 

 pules, which are yet to be described, in many in- 

 stances attached to the petiole; as in the Rose 

 tribe, Rosa, 75, in which case the petiole is 

 termed stipuliferous (stipuliferus). It is termed 

 glanduliferus, 76, when one or more glands are 



seated on it, as in the genus Passiflora ; in the 

 Castor-oil plant, Ricinus communis, &c.: and 

 floriferus when it bears the flower, as in Elm- 

 leaved Turnera, Turnera ulmifolia. 



In respect to insertion, in the majority of in- 



LL*2 



