TABLE VI. 4S5 



242 Scabrum, rough, covered with rigid punctures raised above 

 the surface. 



'243 Hispidum, hispid, covered with hard bristles. 



244 Aculeatum, prickly, covered with sharp prickles, 378. 



245 Stuigosum, strigous, armed with lance-shaped prickles, 167. 



XI. Expansion. 



246 Planum, plane, with a flat equal surface. 



247 Canaliculatum, channelled, a deep channel or furrow, run- 



ning lengthways. 



248 Concavum, concave, when the disk is arched from the mar- 



gin, and forms a hollow. 



249 Convexum, convex, opposite to concave : these two terms 



arise from the same cause, the margin being too tight 

 for the expansion of the disk; therefore if a leaf is con- 

 cave on one side, it is convex on the other. 



250 Cucullatum, hollowed, when the sides of a leaf press to- 



gether at the base, and expand towards the apex. 



251 Plicatum, plaited, folded in sharp flexures from the disk to 



the margin. 



252 Undatum, waved, the flexures or folds being obtuse from 



the disk to the margin. 



253 Crispum, curled, where the margin is plaited, but the folds 



do not reach to the middle rib of the disk, 



XII. Substance. 



254 Membranaceum, skinny, pellucid, without any fleshy sub- 



stance. 



255 Scariosum, of a dry parched substance, that sounds when 



touched. 



256 Gibbum, gouty, when both sides of a leaf is bunched out 



by a copious quantity of pulp. 



257 Teres, cylindrical, or pillar-shaped. 



258 Depressum, more pulpy in the disk, and flatted towards the 



sides. 



259 Compressum, more flatted in the disk, and pulpy towards 



the sides. 



