294 



ON SEEDLINGS 



division of the lamina as well as its component parts. This variation 

 depends greatly on the luxuriance of the plant or otherwise, brought 

 about by cultivation. 



Solanum Fontanesianum, Dun. (fig. 

 544). 



Primary root slender, oblique, 

 colourless, with many slender, branched, 

 fibrous, lateral rootlets. 



Hypocotyl succulent, 2 cm. long, 

 1 mm. thick, terete, glabrous, colour- 

 less, with the petioles of cotyledons 

 forming a kind of sheath around the 

 base of the stem. 



Cotyledons stalked, 1-5-2 cm. long, 

 4 mm. wide, lanceolate, tapering to 

 the base, acute at the apex, glabrous 

 except the pubescent petiole, with sunk 

 midrib, succulent although thin, yel- 

 lowish-green, not very persistent. 



Stem succulent, terete, ciliate, 

 colourless ; 1st internode 5 mm. long, 

 1 mm. thick. 



Leaves simple, cauline, alternate, 

 exstipulate, petiolate, alternately and 

 ascendingly penninerved, pubescent, hairy, setose and bristly or 

 subspiny, membranous, pale green ; petiole semiterete, channelled 

 above, hirsute. 



No. 1. 2-5 cm. long, 7'5 mm. wide, oblong, oblique and cuneate 

 at the base, rounded at the apex, with a sinuate margin, alternately 

 penninerved, hirsute, pubescent, thin, light green ; petiole 1'25 

 cm., semiterete, shallowly channelled, pubescent or ciliate. 



Nos. 2 and 3. Similar, but scolloped or repandly pinnatifidj and 

 showing a few spines on the midrib and primary nerves. 



Solanum Dulcamara, L. 



Primary root tapering finely, flexuose, with a few similar root- 

 lets. 



Hypocotyl as in last species, but dull green, ultimately woody. 



Cotyledons oblong, obtuse, tapering to the base, glabrous ; 

 lamina 1'4 em. long, 5 - 5 mm. wide ; petiole somewhat grooved 

 above, 5 mm. long. 



.Stem erect at first, ultimately decumbent or trailing, flexuose, 



FIG. 544. 



Solanum Fontanesianum. 

 Two-thirds nat. size. 



