ME. a. BBNTHAM ON GEAMINEiB. 57 



respects intermediate between the two groups. The structure of 

 the spikelets, with the two outer glumes very minute or deficient, 

 connects them with the preceding genera; whilst the spicate 

 inflorescence and three stamens are nearer those of Alopecurus, 

 although the spikes are much more slender and several on the 

 same stem, on long slender peduncles. The genus is confined to 

 those of the § a of Steudel's ' Synopsis ;' the species arranged 

 under § h have a very different structure, and form the section 

 Becheropsis of Pennisetum. 



10. CsYPSis, Ait. (Antitraffus, Gsertn.), must be limited to the 

 original C aculeata, which alone has the characters of the tribe. 

 All the other species usually referred to it have the 2-nerved palea 

 and other characters of the Agrostese, and were well separated by 

 Host under the name of Heleochloa. It is true that some short- 

 spiked varieties of Heleochloa scJuxnoides have very much of the 

 aspect of 0. aculeata ; but besides the structure of the spikelets 

 and the articulation of the rhachilla, they are readily distinguished 

 by the rhachis of the spike, which is linear and cylindrical, not flat 

 as in Crypsis. 



11. CoEifircopTiE,Linn., is a single Oriental species, very near 

 Crypsis, but well characterized by the peculiar inflorescence and 

 by the form of the fruiting spike and peduncle, which has supplied 

 the generic name. 



12. AioPECiTETJS, Linn., including Cololachne, Beauv., and 

 Tozzettia, Savi, is a well-known and perfectly definite European 

 and temperate Asiatic genus, with the habit nearly of Phleum and 

 the structure of the spikelets that of Oryzeae. Above forty sup- 

 posed species have been enumerated ; but at least half of them 

 must be regarded as trifiiug varieties of the two or three com- 

 monest species, which have now, and perhaps from remote times, 

 spread over a great part of the civilized world. 



Tribe IV. Teistegine^. 



This tribe, first proposed by Nees, has been fuUy adopted and 

 much extended by Munro, and now consists of thirteen genera, 

 which had been variously scattered in Pauicese, Andropogonese, 

 and Agrostese, and are really more or less connected with the three 

 tribes. They differ from Paniceee and approach Andropogonese in 

 the thin, often hyaline texture of the fruiting glume and palea, and 

 by the frequent presence of a slender, often bent awn on the 

 flowering glume. From Andropogonese they are chiefly separated 



