LVTIIRAKIE.E 549 



Punica Granatum (fig. 355) which has transversely oblong, 

 deeply emarginate, five-nerved cotyledons, rounded at the 

 sides. The outer pair of nerves follows the outline of the 

 cotyledons, parallel to the margin. Their great width is due 

 to their being convolute in the seed, which is unusually large 

 for the Order. The leaves are opposite, lanceolate, shortly 

 petiolate and decurrent upon the stem, making it narrowly 

 four-winged as in Ly thrum. The thick testa of the seed splits 

 open during germination owing to the rapid growth and 

 expansion of the cotyledons. 



Cuphea silenoides, Necs (fig. 353). 



Fruit a capsule, oblong, straight or oblique, one-celled by rupture 

 of the septum, with the free columnar placenta bearing numerous 

 seeds on one side only, while the side representing the placenta of 

 the smaller and empty coll is naked ; dehiscing longitudinally along 

 one side. 



Seed shortly and broadly obovate, retuse, generally shallowly 

 emarginate, much compressed, glabrous, dull slaty-blue marked 

 with black dots ; bilum and 

 micropyle basal ; cbalaza 

 apical, thickened for a short 

 way internally, causing the 

 cotyledons to be emarginate ; 

 raphe forming a visible ridge 

 along one flattened face ; testa 

 thick, coriaceous ; tegmen thin, 

 membranous, whitish. 



Endosperm absent. 



Embryo straight, confor- 



, , ,-, , FIG. 353. Cuphea silenoides, x 10 A, 



mmg closely to the interior long itudinal "section of seed: cA,chalaza| 



Of the seed wllich it fills, CO- OP, testa ; and ic, tegmen; r, radicle; m, 



. , ,11 1-1 micropyle. B, Transverse section of seed. 



lourless ; cotyledons orbicular, 

 emarginate, rather deeply auri- 



cled at the base, plano-convex or nearly flat ; auricles evidently 

 produced to fill up the space in the seed, and give room for the 

 radicle and plumule ; radicle protruding slightly beyond the coty- 

 ledons, trilobate with the middle point turbinate and generally 

 longer than the obtuse lateral points. 



Seedling (fig. 354). 



Primary root tapering, flexuose, much branched. 



