MEDULLOSEAE 455 



broad, wing-like prolongation of the sarcotesta (Figs. 



Fig. 171. — Diagrammatic transverse section through the body of the seed, at about the 

 level of the line m.m. in Fig. 170 ; r 1 , principal ridges ; ?■'-, secondary ridges. Other 

 lettering as in Fig. 170. x about 3. From a drawing by Mr; A. J. Maslen, 



170, 172). It is not quite certain, however, to what 



p.c.b. 



FiG. 172. — Diagrammatic transverse section through the micropyle, at about the level of 

 the line p.c.b. in Fig. 170, showing the wing on one side. Lettering as in Fig. 170. 

 From a drawing by Mr. A. J. Maslen. 



extent the flattened form of this part of the seed is 

 natural. 



