DESCRIPTIONS OF TRIBES AND GENERA. 



155 



almost at right angles to the common axis ; spikelets 

 cylindrical ; flowering glumes with a short mucronate 

 point. 



Species one (I. Mendocinum Phil.), in the Argentine 

 Republic. 



Obs. — This genus most probably belongs to Diplachne. 



225. (225) Eatonia Raf. (Reboulea Kunth, Colobanthus 

 Trim). Spikelets two-flowered, small, shining, very nu- 

 merous in contracted [expanded in flower] and often 

 dense panicle. Habit of Koeleria. 



Species two, E. obtusa and E. Pennsylvanica Gray, in 

 North America [probably a third species is represented 

 by E. Jiliformis Vasey] . 



226. (224) Avellinia Pari. A small, annual grass with 

 a slender panicle, and very narrow spikelets ; lower 

 empty glumes short, very narrow, almost setiform, the 

 second very large ; flowering glumes 

 awned below the point. 



Species one {A. Michelii Pari.), in the 

 regions of the Mediterranean. 



227. (223) Koeleria Pers. (CoUinaria 

 Ehrh.). Spikelets 2-5-flowered, shin- 

 ing ; empty glumes unequal ; flowering 

 glumes keeled, entire, awnless, or short- 

 awned. Usually low, narrow-leaved 

 grasses, with narrow, compact panicles. 



Species fifteen, distributed through- 

 out the temperate regions, mostly in 

 Europe ; isolated species in South Africa, 

 Patagonia, and the Sandwich Islands. 



Sec. I. Airochloa Link (as a genus). 

 Flowering glumes awnless or with short 

 mucronate points. K. cristata Pers., 

 with silvery shining panicles ; upon dry 

 meadows in Europe and "Western North 

 America. A profitable fodder-grass for 

 sandy soils. 



Sec. II. Lophochloa Reichen. (as a genus), (jEgialitis 

 Trin., JEgialina Schult., WUhdmsia C. Koch). Flower- 

 ing glumes short-awned from or below the point. K. 



Fig. 80. —Koeleria 

 phleoides Pers. (Af- 

 ter Nees, Gen . Germ. , 

 I. 63.) 



