SOLANACEJB 



297 



Cotyledons thick, fleshy, linear-oblong, obtuse, tapering to the 

 base, entire, glabrous, one-nerved, with young buds in their axils. 



Stem erect, terete, glabrous, herbaceous, ultimately woody, 

 internodes from 7'5-10 mm. long. 



First leaves simple, entire, alter- 

 nate, fleshy, oval, obtuse, petiolate, 

 glabrous, one-nerved like the coty- 

 ledons, exstipulate, but some of 

 them have a small stipule-like leaf 

 at the base. 



Datura gigantea, Hort. (fig. 

 54G). 



Primary root long, tapering, 

 colourless, giving off a few adven- 

 titious rootlets, annual. 



Hypocotyl herbaceous, succu- 

 lent, erect, terete, glabrous, purple, 

 and shining, about 3 cm. long, 

 2-4 cm. thick, when the plant has 

 developed two or three leaves. 



Cotyledons linear, obtuse, peti- 

 olate, glabrous, succulent, one- 

 nerved ; lamina 2'5 cm. long, 4 mm. 

 wide ; petiole 7'5 mm. long. 



Stem herbaceous, succulent, erect, terete, glandular when young, 

 ultimately glabrescent, green, stained with purple ; 1st internode 

 9 mm. long ; 2nd 2 mm. 



Leaves simple, cauline, alternate, exstipulate, petiolate, hairy on 

 both surfaces when young, glabrescent when mature, alternately 

 penninerved, deep green stained with purple, at least in the young 

 state. 



No. 1. Ovate-oblong, obtuse, entire, cuneate at the base. 



No. 2. Triangular-ovate, subacute, subtruncate at the base, with 

 two angles or blunt teeth on each side, foreshadowing lobing. 



No. 3. Oblong, subacute, constricted near the base, trilobulate 

 on each side. 



Ultimate leaves large, triangular-cordate, subacuminate, obliquely 

 pointed, lobulate and coarsely dentate, slightly unequal and trinerved 

 at the base, with strong, branching, alternate nerves above, reticu- 

 late, pubescent on both surfaces; petiole terete with a shallow 

 groove above the base on the upper side. 



FIG. 546. Datura giyantea 

 Half nat. size. 



