SUBSTANCE OF LEAVES. 431 



5. Co m press ed, flatted; when they are so compressed by their 

 opposite marginal sides, that the substance of the leaf becomes 

 greater than the disk. 



6 Plane, level; when they have both surfaces every where' 

 parallel. 



7. Gibbous, bunched; when, by the plenty of the pulp, both 

 the surfaces are rendered convex. 



8. Convex, rounding; when the disk rises higher than the 

 sides. 



9. Depressed, pressed down; when the sides rise higher than 

 the disk. 



10. Canaliculate, channelled; when a deep furrow runs 

 along it, and sinks it almost to a half cylinder. 



11. Ancipites, double-faced; when the disk is convex, and 

 there are two prominent longitudinal angles. 



1-2. Ensiform, sivord-shaped ; when they are ancipites, and 

 grow narrower from the base to the apex. 



13. AcinacIform, falchion or scimitar-shaped; when they 

 are fleshy and compressed, with one edge convex and narrow, 

 and the other straighter and broader. 



14. Dolabriporm, hatchet-shaped ; when their figure is round- 

 ish, compressed, and obtuse; gibbous outwardly, with a sharp 

 edge, and taper towards the lower part. 



15. Lingueform, tongue-shaped; when they are linear, fleshy, 

 obtuse, convex underneath, and often with a cartilaginous 

 margin. 



16. Triquetrous, three-corned ; when they are subulate, an<i 

 have three flat longitudinal sides. - ■ 



17. Sulcate, furrozved ; when they are scared longitudinally 



