a whorl, the two anterior ones shorter and narrower : flowerinj? j^himes o-nerved, 

 those of the n])per fiowers :5 toothed, teeth uwnlike. Stamen.s three. Pi.stillate 

 R])ikelets one flowered, with a three a^^^led prolongation of the rachilla beyond 

 the flower ; emi)ty glumes 3, equal, cuneate, whorled, flowering glumes on short 

 pedicels. 3-nerved. 3-toothed, the middle tooth longest; styles 2 ; stigmas plumose. 

 A delicate, much Ijranched, 

 creeping gi-ass with erect 

 spikes. i. J 



Species one {F. mexicana 

 Scribn. ) in Mexico. 



This grass is quite distinct 

 from other members of the 

 tribe. The significance of the 

 three empty glumes standing 

 in a whorl is not clear; in 

 the pistillate plant they are 

 attenuated l)elow into a short, 

 bearded pedicel and appear 

 almost like an involucre of 

 three rudimentary spikelets 

 (compare Themeda) . 



Under Pdsjxihwi, Sect. I, Eu- 

 jiaspalum, insert Paspalan- 

 thinm Desv. as a synonym. 



Under Panlcum insert, after 

 Trichachne, GrtDiieriiim Desv.V 

 as a synonym. 



After Oplisuienus Beauv. add 

 Hippugrofitis'Rmn\}\\., 1749, as 

 a synonym. 



Under Setaria add : 



"The generic name Setaria 

 has been much discussed in 

 recent times from the fact that 

 it was originally used by Beau- 

 vois for a, speciea of Pen)iisetuni 

 and moreover had been used be- 

 fore by Acharius for a genus of 

 lichens. O. Kimtze combines 

 Si'f((>'ia with Chamairaplds 

 R. Br. and uses for Setaria 

 the latter, older name; Scrib- 

 ner, on the contrary, rightly 

 does not approve of this com- 



FiG. ■2.~F()unii(ia nic.iicaiia, fenuile plant: «, tei-mi- 

 iial portion of rachis with two spikelets: /<, a si)ikelet: 

 «, (I, i\ outer glumes (f may represent a Klume-likc contin- 

 uation of tlie secondary axis supporting the sjjikelet, or 

 it may represent a second spikelet of a cluster or two): 

 /, flowing glume raised upon a shoi't joint of the rachilla 

 (stipe); y, palea. At tlie left of a is a :i-awned prolonga- 

 tion of the rachilla. The pistil Is shown in tlie upper 

 left-hand corner. 



bination, and proposes for 



Setaria the new name " CJuetochloa" now adopted by American authors. 



After ChfctocJdoa add: 



Setariopsis Scribn. Rept. Field Columb. Mus. (bot. ser.) i: 288, 1890. Plate 

 XI. Panicles narrow, interrupted, and spike-like, the short branches bristle- 

 pointed ; second glume broadly ovate or orbicular, auriculate or cordate at the 

 base, 11-13-nerved; third glume narrow, 11 -nerved, lyre-shaped, the margins 

 below becoming somewhat coriaceous at matiarity; the fourth or flowering 

 glume mtich shorter tlian the second and third, apiculate or mticronate-pointed. 



Species two, in Mexico and Central America. 



