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Group X. Hairy Grasses. 



YORKSHIRE FOG, FLYING BENT, SWEET VERNAL, 

 AND FALSE OAT. 



These have been already considered, and may be 

 distinguished thus : 



YELLOW OR GOLDEN OAT GRASS. 



x. 2, i. The blade has twenty or more fine, but distinct 

 ribs, which are acute. The acute summit of each rib 

 has a single row of hair. 



The sheath is completely clothed with hair. The 

 ligule is quite conspicuous, and has a hairy back. 

 Summary : 



a. Ribs low, and acute. 



b. Hair abundant on sheath, arranged in single 



rows along each rib. 



c. Ligule conspicuous, apex toothed, back hairy. 



COUCH GRASS. 



x. 14, 12. The hair is sparse, and, at times, quite short or even 

 absent. The ribs on the blade are very low and flat, 

 often indistinct. 



The most conspicuous and distinctive feature is 

 seen at the base of the blade : there, a pair of pointed 

 ears are readily observed by the naked eye. The very 

 low ribs, and the ears, distinguish this from Agrostis. 



