3G8 



SIR J. LUBBOCE: PHTTOBIOLOGICAL OBSERTATIOXS. 



surface. The embryo (fig. GS, r c) is curvedj following tlie concavity 

 of tlie hollow, Avith tlic larger 2)art of the perisperm lying towards 

 the periphery. The cotyledons are linear and obtuse. Tig. G9 

 shows that, so far as the form of the seed is concerned, there is 

 no reason Avhy tlie cotyledons should not be much broader than 

 they are. The explanation may perhaps be found in the struc- 

 ture of the pericarp (^fig. (j^^p.c)^ which is thick, tough, and corky. 



Fig. r,8. 



lug. 09. 



1 i^ 



i 



1 



Fi.r 



72 



Fig. 70 



Galium sac-eharatum. 



Fig. 73 



Galium Ajparine, 



Fiir. G8. 



Fig. 71. 



Longitudinal section of seed, x 8. Fig. G9. Transverse section of 

 seed, X 8. Fig. 70. Germinating seedlinff, X 4. 



j^^^i.^.. ..v...i.»- ^^^^.v^.M. ^i. oKjuvi, ^ o. -Tig. ui/. xiaiio>c 



seed, X 8. Fig. 70. Germinating seedling, X 4. 



Longitudinal section of seed, x 8. Fig. 72. Transvc 

 seed, X 8. Fig. 73. Germinating seedling, X 4. 



erse section of 



