116 ME. (J. BEHTHAM ON GEAMIKE^. 



29. Atellinia, Parlat., is a single "West -Mediterranean annual 

 with the hahit of SMsmus, and placed by Savi in Bromus, by 

 Grussone in Avena, and by DeCaudolle in Koeleria. It is well 

 marked amongst Eragrosteee by the outer glumes, of which the 

 lowest is almost reduced to a bristle, and the second broad, mem- 

 branous, and the largest of the spikelet ; the flowering glumes 

 awned. 



30. Eatonia, Eafin. {Rehoulea, Kunth, Colohanthus, Trin.), 

 two or three closely allied North -American species, with the 

 second empty glume the largest of the spikelet, as in Avellinia ; 

 but the habit is very different and the glumes all unawned. 



31. DissANTHELiTjir, Trin. (Phalaridium, Nees, Stenochloa, 

 Nutt.), comprises two, or perhaps three, species from the Andes 

 of South America and the coasts of Mexico and California, 

 figured and described in the last part of Hooker's leones. They 

 have most of the characters oi Schismus, but, besides the widely 

 distant geographical stations, they differ in the nerves of the 

 flowering glumes always three, not five. 



32. MoLiNiA, Moench {Unodium, G-audin), a single well-known 

 European and temperate Asiatic species, and 83. Sphenopus, 

 Trin., a very pretty little Mediterranean annual, require no fur- 

 ther comment on the present occasion. 



34. Catabeosa, Beauv., can only be distinctly characterized if 

 reduced to the single C. aquatica, Beauv., placed by some authors 

 in Aira, by others in Glyceria. In it the three nerves of the 

 flowering glume characteristic of Eragrostese are very promi- 

 nent. The two or three Oriental species added to it by Trinius 

 belong to the genus Coi^odium. 0. antarctiea, Hook, f., is a Triodiq,. 

 C. glaucescens, Phiiippi, and C. magellcmica, Hook, f., are true 

 Glyceria. 



35. Eeageostis, Beauv., an almost cosmopolitan genus of 

 above eighty species (multiplied by Steudel and others to about 

 two hundred and fifty), is a very natural one so far as the great 

 majority of species are concerned, and distinctly limited if we 

 include the three-nerved glumes amongst the essential characters. 

 Yet in other respects there are exceptional species which have 

 been variously referred, even by modern botanists, to Poa, Fes- 

 tuca, Priza, Dactylis, Eleusine, or Leptochloa, which they in some 

 measure approach respectively ; and some have been proposed as 

 substantive genera ; but it has appeared to me that the genus 

 may be best defined if retained entire, dividing it into the six 



