160 



ORaANOGRAPHT. 



lamina is broad and hollowed out at its base into two round 

 lobes, and more or less pointed at the apex, so that it somewhat 

 resembles in shape the heart in a pack of cards, the leaf is 

 cordate or heart-shaijied {fig. 317), as in the Black Bryony {Tamus 

 communis) ; or if of the same shape, but with the apex broader 

 than the base, and hollowed out into two round lobes, it is oh- 

 cordate or inversely heart-sha/ped {fig. 324). When a leaf resembles 



Fig. 325. 



Fig, 328. 



Fig. 327. 



Fig. 329. 



Fig. 330. 



Fig. 325. Lunate or crescent-shaped leaf. Fig. 326. Sagittate leaf. 



Fig. 327. Hastate leaf. Fig. 328. A portion of the stem of Woody 



Nightshade {Solanum Dulcamara), bearing flowering stalk and an auricu- 



late leaf. Fig. 329. A subrotund or rounded leaf, with entire margin. 



Fig. 330. Orbicular peltate leaf. 



