ME. a. TBENTHAM ON GBAMIlTEJi!. 115 



much resembles the spikes of Chloridese, and the glumes, though 

 very pointed, are unawned ; and Falona, Adans., altered by Du- 

 mortier to Phalona, for the C echinatus. Linn., and O. elegans, 

 Desf , with the panicle or head more like that of a Bactylis, but 

 with awned glumes. 



The characters of our fifth subtribe, Eragrostece, like those of 

 Eufestuceee, are chiefly negative. The two together comprise all 

 the FeatuceaB which have not the peculiarities of either of the 

 other six subtribes, and differ from each other in the Eragrostese 

 having three prominent nerves to the flowering glumes, the Eufes- 

 tucess five or more nerves, sometimes rather obscure. Trifling as 

 this character may be, it is a fairly constant one, the exceptional 

 species being exceedingly rare ; and I have found no other one 

 so useful in distributing these numerous genera into groups. 

 We have included in EragrostesB twelve of them, though the last 

 of them {JEctrosia) might be equally well placed under the fol- 

 lowing subtribe Melicese. 



28. KcELEEiA, Pers., has about twelve species, of which ten 

 are European, temperate Asiatic, or North African, one of them 

 extending over extratropical America north and south and South 

 Africa ; the two remaining species are endemic, one in South 

 Africa, the other in the Sandwich Islands. The genus has been 

 generally admitted with little variation ; but it is difficult to assign 

 to it any positive character. The panicle is usually dense and 

 narrow, often spike-like; and the glumes are more scarious, espe- 

 cially on the margins, and have fainter nerves than in the others 

 of the subtribe. It has been divided into two sections, maintained 

 by some as genera : — 1. Airochloa, Link, to which Eeichenbach 

 restricts the name of Koeleria, with the glumes obtuse or acute 

 but without distinct points; and 2. Lophochloa, Eeichenb., to 

 which Link restricts the name of Koeleria {JSgialitis, Trin., 

 altered by Schultes to ^gialina), in which the flowering glumes 

 have a distinct point or short awn at or just below the tip. This 

 section includes, besides the species enumerated by Cosson and 

 Durieu in their ' Flore d'Algerie,' K. Gerardi, Munro,from South 

 Africa, and K. glomerata, Kunth {K. vestita, Nees), from the 

 Sandwich Islands. The last species differs slightly from the 

 genus in the long loose panicle, which, however, is more dense in 

 our specimens than it is figured by Kunth. C. Koch's genus 

 Wilhelmsia, from the Caucasus, is, according to Grisebach, only 

 a depauperated specimen of K. phleoides, Pers. 



