112 THE TRUE GRASSES. 



like, shining, flowering glume downy ; awns almost basal, 

 geniculate. 



Species one (T. miens Link), in the western countries 

 of the Mediterranean region. 



136. (133) Calamagrostis Roth (Figs. 54 and 55). Pani- 

 cles very variable ; hairs on the callus of the flowering 



glume sometimes short and sometimes 

 longer than the glume itself, which is 

 usually thin-membranaceous and vari- 

 ously awned. Frequently reed-like in 

 habit. The spikelets usually larger 

 than those of Agrostis. 



Sec. I. Epigeos Koch. Rachilla not 

 produced ; hairs on the callus usually 

 long. 



Species ten, in the north temperate 

 zone of the Old World, including C. 

 Epigeos (L.) Roth, C. titorea DC., (7. 

 lanceolata Roth, and C. Halleriana DC. 

 Sec. II. Deyeuxia Beauv. (as a 

 genus). Usually with a hairy prolongation 

 of the rachilla ; callus hairs shorter than in 

 Sec. I, very rarely wanting. 



Species over one hundred and twenty, 

 distributed throughout all the temperate 

 and arctic zones, also upon the high moun- 

 tains of the tropics ; about sixty species in 

 the Andes alone. [Calamagrostis Tweedyi, 

 Suksdorfii, Montanensis, and ambigua Scribn. 

 are Rocky Mountain species.] 



Achcete Fourri., Relchela Steud., Cinnas- FlG 55 JJ 

 trum Fourn. are more or less anomalous ^f !< L 

 species of this section. ( Getf r Germ e , e i! 



137. (139) Cinnagrostis Griseb. Like the 34 > 

 preceding, but with unisexual spikelets ; rachilla with a 

 long and very hairy prolongation ; callus short, bearded. 



Species one (C. polygama Griseb.), in the Argentine 

 Republic. 



138. (141) Ammophila Host. (Psamma Beauv.) Pani- 

 cles usually narrow and spike-like. Flowering glume 



