SOLAXACE.E 



299 



Schizanthus retusus, Hook. (fig. 548). 



Primary root long, tapering, stout, colourless, with a few lateral 

 fibres, annual. 



Hypocotyl mostly subterranean, glabrous, terete, colourless in 

 the lower half, purple above, To cm. long. 



FIG. 548. Schizanthus retusus. Nat. size. 



Cotyledons foliaceous, bright green, glabrous, petiolate ; lamina 

 subulate-oblong, obtusely pointed, 1 cm. long, 3'5 mm. wide ; 

 petiole convex beneath, grooved above, 7 mm. long. 



Stem annual and developed when about to flower. 



Leaves pinnatisect, radical and cauline, opposite at least in seed- 

 ling, exstipulate, petiolate, bright green, slightly pubescent when 

 young, glabrescent ; petioles channelled above, convex beneath, 

 dilated at the base. 



First pair slightly unequal, pinnatisect at the base, pinnatifid 

 upwards, ovate in outline, obtuse ; segments entire or slightly 

 toothed. 



Second pair ovate-oblong in outline, pinnatisect ; lateral seg- 

 ments oblong, serrate ; terminal lobe trifid with mostly entire 

 segments. 



Third pair similar but much more cut, with subpinnatifid seg- 

 ments. 



