{} J. M. Macfarlane. — Nepenthaceae. 



development of longitudinal veins occurs in N. bicalcarata, where 12 to 15 may run on 

 either side of the midrib. The parallel veins are united by numerous transverse ones, 

 that may radiate out at right angles to the rib, or may run more or less obliquely 

 upwards. All of these may be of equal strength and continuity, but more frequently 

 each alternate vein is finer and shorter than that above or below. The branching and 

 reunion of the veins are copious and intimate, so that the leaves are extremely resistant 

 to strains. The vernation of the leaves is involute. 



The next leaf portion, the (c) tendril or cirrhus is, as already described entirely 

 absent froni the earliest or seedling leaves, and only begins to form as the pitchered 

 part of the lamina grows asunder from the basal part. In adult leaves it is nearly 



Fig. 2. Nepenthes gracilis Korth. 



