32 LEAVES. 



already explained, p. 14. To these may be added the 

 following, chiefly appropriated to leaves. 



1. DOTTED, (punctatum) full of small points hol- 

 low and transparent, or having vesicles containing in 

 them an essential oil. Ex. St. John's- wort, Bijpericum 

 perjbratum. 



2. WRINKLED, (rugosum) when the veins are 

 tighter than the surface between them, causing the lat- 

 ter to swell into little inequalities. Ex. Various species 

 of Sage, Salvia. 



5. BLISTER Y, (bullatnm) is only a greater degree 

 of the last. Ex. Cabbage, Bra&sica oleracea. 



4. PLAITED, (plitatum.) PL 7, fig. 3. When 

 the disk of the leaf, especially toward the margin, 

 Is acutely folded up and down. Ex. Veratrum viride. 



Observation. Folded like a fan, distinguished from waved by 

 the folds being angular. J\lartyn. 



5. UNDULATE, (undulatwn.) PI. 7, fig. 4. Waved ; 

 \vhen the disk near the margin is waved obtusely up 

 and down. 



6. CURLED, (cri spurn.) PL 7, fig. 5. When the 

 border of the leaf becomes more expanded than the 

 disk, so an to grow elegantly curled and twisted. Ex. 

 Jllafaa critpa 



7. CONCAVE, (concavum) hollow ; depressed in 

 the middle, owing to a tightness in the border. 



8 CONVEX, (wuwx-n 1 ) opposed to the last. 



9. VEINY, (vcnosum) Pi. 7, fig. 6. When the 

 vessels by which the leaf is nourished are branched 

 and subdivided, and more or less prominent, forming a 

 net- work on either or both its surfaces. Ex. Common 

 Thorn, Crahegus, and Pear, Pynis 



10. NERVED, (nervosum or costatum.) PI. 7, fig. 7. 

 Ribbed ; when they extend in simple lines from the 

 base to the point. Ex. Ladies'-s! ; pper, Cypripcdinm. 



It. THKEK-WEHVED, (trinerre.) PI. 7, fig 8. Three 

 ribbed $ is applied to a leaf that lias three ribs, all die- 



