LEAVES. 



77 



Fig. 37. Stellated, or whorled (from Stella a 



star), this term is applied both to leaves 

 and flowers and relates to the manner m 

 which they grow around the stem, as in 

 Fig. 37. 



Tubular, there are many varieties of 

 this kind ; the leaf of the onion is a com- 

 plete tube ; the Sarracenia or side-saddle 

 flower has the sides of its leaf united form- 

 ing a cup, which is found filled with liquid, 

 supposed to be a secretion from the ves- 

 sels of the plant. In some countries of the torrid zone is the 

 wild pine, Tillandsia, the leaves of which are hollowed out at 

 their base, so as to be capable of containing more than a pint. 

 A traveller says, by making an incision into the base of this 

 leaf and collecting the water in our hats, we could obtain a 

 sufficient supply for the relief of the most intense thirst. The 

 fluid is not a secretion from the plant, but is deposited during 

 the rainy season. 



Fig. 38. 



The pitcher-plant (Nepenthes distillatoria) (Fig. 38), affords a 

 most singular tubular- receptacle in an appendage to its leaf; this 

 is lanceolate ; beyond the apex of the leaf , the mid-rib extends 

 in the form of a tendril ; at the extremity of this tendril is the 

 cylindrical cup or pitcher b, about six inches in length and one 

 and a half in diameter ; it is furnished with a lid, c. This is 

 usually found filled with pure water,' supposed to be a secre- 

 tion from the plant. Insects which creep into this cup are 

 drowned in the liquid, except a small species of shrimp which 

 lives by feeding on the rest. The pitcher-plant is a native of 

 Ceylon where it is called monkey cup, on account of its being 

 frequented by these animals for the purpose of quenching their 

 thirst. 



Compound leaves. 



When several leafets grow on one petiole the whole is term- 

 ed a compound leaf, as in the rose. 



Stellated Tubular Compound leaves. 



7* 



