Fig. 49 Dissemination of grasses. 1, SLipa apartea, twisted awn and hairs, self- 

 burying "seed;" 2, S. comafa; .V, 5 viridula; 4, Zizania aquatica, a noatlng -'seed ;•" Cen- 

 chnis trihidnides, with a bur for attaching Itself; (1, S. pennata; ;, Hordeiun jubatum, ani- 

 mal dissemination; S, Avenafatua, a "seed " with hygroscopic characters. (King ) 



