16 ON SEEDLINGS 



First pair T65-2 cm. long. 

 Second pair 4-6'5 cm. long. 

 Third pair 4-6 cm. long. 



Mesembryanthemum pinnatifidum, L. fil. 



Primary root fleshy, tapering and giving off lateral rootlets, 

 annual. 



Hypocotyl succulent, stout, red, glabrous, about 8 mm. long, 

 2 mm. thick. 



Cotyledons linear-oblong, obtuse, fleshy, flattened above, convex 

 beneath, connate and perfoliate at the base, green often suffused 

 with red, 6 mm. long, 2 mm. wide. 



Stem annual, ultimately elongated, procumbent. 



Leaves simple, radical and cauline, opposite, exstipulate, 



PIG. 403. Tetragonia expansa, x 14. A, longitudinal section of seed : 

 P, endosperm; F, funicle ; M, micropyle; R, radicle; OT, testa; 

 IT, tegmen. B, transverse section of seed : C, cotyledons. 



petiolate, glabrous, succulent, crowded with glands which cover 

 all parts of the plant, like crystalline papilla?; petioles stout, 

 succulent, channelled above, convex beneath, much dilated at the 

 base and amplexicaul. 



First pair spathulate, obtuse, entire. 



Second pair sometimes similar or somewhat broader, but more 

 frequently oblong, obtuse, shallowly and repandly lobed ; lobes 

 rounded, alternate. 



Third and fourth pairs oblong, obtuse, pinnatifid ; lobes rounded 

 or oblong, entire, alternate, largest at the upper half of the leaf, 

 and smallest towards the base. 



