DESCRIPTIONS OF TRIBES AND GENERA. 167 



lets in simple or brauched racemes with very short pedi- 

 cels appressed to the rachis ; stamens and stigmas pro- 

 truding. F. Lachenalii Spenn. in Western Europe. 



266. (260 §) Catapodium Link. Spikelets very short 

 pedicelled, in simple racemes. 



Species two, C. loliaceum Link and C. Lolium (Bal.) 

 Hack., in the regions of the Mediterranean. 



267. (260 §) Scleropoa Griseb. Panicles one-sided, 

 slightly branched. Spikelets with thick pedicels. 



Species two, in the Mediterranean region, one of which, 

 S. rigida Griseb., is also in Western Europe as far as 

 England. Like the preceding genus, it differs from Fes- 

 tuca only in the punctiform hilum, and perhaps should 

 be considered as a sub-genus. 



Sub-tribe H . — Brachypodieae. 



Spikelets like those of Eufestucem, but with simple, roundish starch- 

 grains, and with the outermost cell-layer of the nucellus, which in 

 most grasses disappears when the fruit is ripe, developed into a 

 strong, thick-walled layer. 



268. (263) Bromus L. (Fig. 89). Spikelets in panicles, 

 rarely in racemes, usually large ; flowering glumes 5-9- 

 nerved, herbaceous, usually two-toothed, awned from 

 the back below the point or from between the teeth, 

 rarely awnless ; awn sometimes straight, sometimes 

 divergent, but never geniculate ; ovary with a 2-3- 

 lobed, hairy, cushion-like appendage at the summit, be- 

 tween the furrows of which arise the stigmas. Stigmas 

 sessile on the anterior side ; fruit linear or oblong, fur- 

 rowed, adherent to the palea. 



Species over forty, most abundant in the north tem- 

 perate zone, some also in temperate South America, 

 a few on the mountains of the tropics. 



Sub-genus I. Festucoides. Mostly tall perennials ; 

 panicles loose ; first empty glume one-, the second usu- 

 ally 3-nerved ; flowering glumes short-awned ; palea with 

 a very short fringe on the keels. Br. erectus Huds., with 

 upright spikelets, ciliate leaves and awns half the length 

 of the flowering glume, grows in dry meadows in Europe. 

 On dry chalky soils it yields considerable hay and is a 



