128 MR. G. BENTHAM ON GRAMINES. 
rhachis is not notehed and the spikelets are not quite sessile, the 
lower ones often two or three together on a very short branchlet, 
not collateral. Nardurus, Reichb., is the F. unilateralis, Schrad., 
differing from the rest of the section in the flowering glumes 
mucronate or shortly awned. Castellia, Tineo, is the F. tubercu- 
lata, Coss. and Dur., in which the flowering glumes are minutely 
tuberculate and the spike often shortly branched. Nardurus 
montanus, Boiss., scarcely differs from F. (Vulpia) delicatula, 
Lag., and F. eynosuroides, Desf., is also referable rather to Vulpia 
than to Catapodium. F. lolium, Balansa, may really be said to 
be intermediate between Festuca (Catapodium) and Lolium. F. 
unioloides, Kunth, is Brizopyrum siculum. Catapodium fusiforme, 
Nees, is Tripogon bromoides, Nees. 5. Seleropoa, Griseb. (Selero- 
chloa, Reichb., not of Beauv.), annuals, often small, with one- 
sided panicles, the short rigid branches bearing few almost ses- 
sile spikelets, at first erect, then spreading or reflexed, giving 
nearly the habit of Cutanda, but the glumes entirely those of 
Festuca. 
67. PAXTATHERA, Philippi, and 68. Popornonvs, Philippi, are 
monotypic genera from the island of Juan Fernandez, both very 
near Bromus, but scarcely reducible to it. 
69. Bromus, Linn., is a fairly natural genus of about forty 
species, generally distributed over the temperate regions of the 
northern hemisphere, with a very few tropical or southern spe- 
cies. Very near Festuca, with which it is closely connected 
through Festuca gigantea, Vill. (Bromus giganteus, Linn.), it differs 
generally in the flowering glumes distinctly notched or shortly 
two-lobed at the end, with an awn between the notches often not 
quite terminal and sometimes slightly twisted, showing an ap- 
proach to Avena, and in the grain (always adnate to the palea) 
crowned by a little appendage or tuft of short hairs. These cha- 
racters are, however, not quite constant ; and the four following 
sections into which the genus has been divided run also much into 
each other, though some of them are often regarded as separate 
genera :—l. Festucoides, Coss. and Dur. (Schenodorus, Griseb.), 
consists of B. asper and B. inermis, Linn., B. erectus, Huds., and 
their allies, tall perennials, coming nearest to Festuca, with the 
awns usually very short or reduced to small points. 2. Steno- 
bromus, Griseb. (Anisanthe, C. Koch), mostly annuals, with narrow 
spikelets and long-awned glumes. Schedonorus of Fries and other 
Swedish botanists, but not of Beauvois, includes both Festucoides 
