CABYOPHYLLILE 



223 



Endosperm central, copious, farinaceous, white. 



Embryo much curved round the periphery of the endosperm, 

 yellowish -white ; cotyledons linear, plano-convex, or semiterete, 

 obtuse, lying in the hroader plane of the seed, accumbent with their 

 edges to the hilum and placenta, the two together thicker than they 

 are wide ; radicle terete, obtuse, as thick at the base as the cotyledons 

 are broad, but thicker above the middle, and as long. 



I figure this species because the cotyledons, like those of B. 

 brachyphylla and Arenaria procumbens, are accumbent. 



Buffonia brachyphylla, B.IL (fig. 203). 



Capsule small, ovoid, one-celled, generally two-seeded, but often 

 one-seeded, dehiscing to the base by two valves. 



Seed reniform, much compressed laterally, and comparatively 



,-or 



-IT 



OT IT I C? 



FIG. 203Bu/onia brachyphylla, x 20. A, vertical section of seed : 

 B, radicle ; H, hilum ; P, endosperm ; C, cotyledon ; 12, tegmen; 

 O T, testa. B, transverse section of seed : T, testa ; I T, tegmen ; 

 P, endosperm ; C, cotyledon ; 11, radicle. 



thin, with a basal notch, minutely and finely reticulated, brown ; 

 testa comparatively thick ; tegmen thin, membranous. 



Endosperm mealy or farinaceous. 



Embryo as in the preceding species. 



Spergula arvensis, L. 



Hypocotyl erect, terete, glabrous, 5-8 mm. long, light green. 

 Cotyledons linear, semiterete, acute, entire, fleshy, glabrous, 

 green, no venation apparent. 



