172 



CLASSIFICATION OF 



[CH. 



flat furrow on the ventral face and a median long "hilum." 

 Rachilla cylindrical, smooth, dilated above. 



The variety F. heterophylla has narrower and longer 



Fig. 78. Festiica ovina, var. 



rubra, a, "seed," nat. size; 



b and c, ditto, x about 7. 



Nobbe. Cf. Fig. 59. 



Fig. 79. Festuca ovina, var. 

 heterophylla. a, spikelet, 

 X about 3^; b, "seed," and 

 c, caryopsis, nat. size ; d and 

 e, " seed," and /, caryopsis, 

 X 7. Nobbe. 



" seeds," and a hispid rachilla. Palea 5 — 6 mm. : caryopsis 

 3-5— 4-.5 mm. (Fig. 79). 



Perhaps Bromus sterilis should also come here (see 

 p. 16.5). 



With regard to these Fescues the student may note that J^. ovina, 

 var. teniiifoUa, has the smallest (4 — 5 mm.) and most ovoid "seeds," 

 usually golden brown in colour. F. rubra is darker and larger 

 (5 — 6 mm.), as is also F. duriuscula (6 — 7 mm.) : the latter is also 



