66 NOMENCLATURE OF THE LEAF. 



d. Lucid as if covered with varnish, as in the shining angelica 

 and shining-leaved rayena. 



e. Convex when the upper surface of the leaf is convex, and the 

 under concave . 



f. Concave the reverse of convex. 



g. Channelled when an oblong or a linear leaf, is longitudinally 

 shallowed, and a transverse section of it is a semicircle, as in the sea 

 plantain. (F. 155.) 



h. Keeled or carinate when the transverse' section is angular 

 and the midrib on the under surface, resembles the keel of a boat, as 

 in the carinate allium. (F. 156.) 



i. Furrowed having several linear depressions, as in the iron- 

 coloured fox-glove. 



j. Streaked marked with coloured lines, as in reed-like canary- 

 grass. 



k. Navel-like when the surface is depressed in the centre, and 

 the leaf is peltate. (F. 157.) 



I. Folded when the disk, especially towards the margin, is 

 acutely folded up and down, as in the curl-leaved mallow. 



m. Waved when the undulations commence from the midrib, as 

 in the base rocket. 



n. Wrinkled when the veins of the leaf are tighter than the sur- 

 face between them, causing the latter to swell into little inequalities, 

 as in various species of sage. (F. 158.) 



o. Blistered when the veins are so tight, that the intermediate 

 space appears blistered. Ibis appearance is frequent in the garden 

 cabbage. 



p. Pitted when the fullness between the veins, produces de- 

 pressions. 



q. Scabrous covered with small hard tubercles, more easily dis- 

 tinguished by the finger than the eye, as in the common mulberry and 

 the hop plant. 



r. Rough when the tubercles are more visible. 



s. Warty when they are still larger and more solid. 



t. Pustular or vesicular when they are evident elevations of the 

 cuticle filled with aqueous fluid, as in the ice-plant. 



u. Muricated when the surface of a leaf, is studded with short 

 herbaceous spines. 



v. Prickly when these have stiff points. 



w. Aculeated when instead of being herbaceous, the spines lire 

 hard and pungent. 



x. Hispid when the surface of a leaf is beset with short stiff hairs. 



