432 ON SEEDLINGS 



H. coronarium, the radicle emerging at one side of the fruit and the 

 cotyledons at the other ; cotyledons at this stage oblong, obtuse, 

 entire. One day after germination. 



Fig. 5 shows the ragged margin of the fissure made by the radicle 

 through the walls of the fruit during germination. 



Hedysamm coronarium, L. (fig. 280). 



Legume linear or oblong-linear, much compressed laterally, 

 constricted between each seed, and consequently moniliform, covered 

 all over with short, stout, straight or hooked bristles, and having 

 the edges of both ventral and dorsal sutures produced into revolute 

 or hooked teeth, many-celled by the constrictions between each seed, 

 and falling into separate, indehiscent pieces each containing a seed. 



PIG. 280. Hedysarum coronarium, x 6. A, longitudinal section of seed : 

 Cav, cavity of the legume, and the only part where the internal cavity is 

 nearly but not quite continuous; PC, pericarp; OT, testa; IT, tegmen; 

 .B, radicle; F, funicle. B, transverse section of seed: VS, ventral suture; 

 D S, dorsal suture ; PC, pericarp ; T, testa ; I T, tegmen ; C, cotyledon ; 

 V, empty space. 



Seed reniform, somewhat laterally compressed in conformity 

 with the hiterior of the segment of the fruit, thicker in the middle 

 than at the sides and in transverse section accordingly elliptic, 

 glabrous, obtuse at either end, pale yellow ; testa pale brownish- 

 yellow, rather thin, closely applied to the tegmen and embryo ; teg- 

 men thin, membranous, paler ; hilum small, annular, situated in a 

 small sinus formed by the curvature of the ovule about the middle 

 of the ventral edge of the seed ; micropyle and chalaza contiguous 

 to, and'on each side of, the hilum, with the former on the upper 

 side, that is towards the apex of the ovary. 



Endosperm absent. 



