SIR J. LrBBOCE — PnYTOBIOLOaiCAL OBSEUTATIOyS. 



367 



embryo fills the seed, this difference sufficiently accounts for the 

 dissimilarity iuthe cotyledons. 



Fis:. 64. 



Fig. 65. 



T 



Fig. 67. 



Fig. m 



Coreojysis auriculata. 



Fig. G4. Acliene, X 14. Fig. 65. Longitudinal section, x 14. 

 Fig. 66. Transverse section, Xl4. Fig. 67. Euibrjo, xl4. 



The genus Galium is an interesting case. Here also we find 

 some species \\ith narrow, some witl) broad, cotyledons; but the 

 contrast seems to be due to a very difierent cause. G. Aparine 

 (fig. 114) Las broad, G. saccharafum (fig. 24) narrow, cotyle- 

 dons. In G. saccJioratum the -fruit (figs. 68-70) is deeply lobed, 

 two-celled, two-seeded, indehiscent, and densely covered with 

 tubercles. The seed is globose, deeply hollowed on the ventral 



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