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. Festuca ovina, var. Fig. 79. Festuca ovina, var. 
rubra. a, ‘‘ seed,” nat. size; heterophylla. a,  spikelet, 
b and ec, ditto, x about 7. xabout 33; b, ‘‘seed,’’ and 
Nobbe. Cf. Fig. 59. c, caryopsis, nat. size; d and 
e, ‘‘seed,” and f, caryopsis, 
x7. Nobbe. 
“seeds,” and a hispid rachilla. Palea 5—6 mm.: caryopsis 
3°5—45 mm. (Fig. 79). 
Perhaps Bronus sterilis should also come here (see 
p. 165). 
With regard to these Fescues the student may note that /. ovina, 
var. tenwifolia, has the smallest (4—5 mm.) and most ovoid “seeds,” 
usually golden brown in colour. /. rubra is darker and larger 
(5—6 mm.), as is also /. duriuscula (6—7 mm.) : the latter is also 
