31!) 



1. Spikelets in open compound panicles, the branches not 

 spiciform. 



2. Coarse erect grasses ; flowering glume or rhachilla 

 long-penicellate. 



3. Rhachilla short-hairy : flowering glumes pen- 



icellate (59) Nci/raiulia 



3. Rhachilla penicellate ; flowering glumes 



glabrous (58) Phiv, unites 



2. Usually slender grasses ; rhachilla and flowering 

 glumes glabrous or hairy ; if hairy, the hairs much 

 shorter than the glumes. 



3. Flowering glumes glabrous, 3-nerved (61) Ernr/rostis ' 



3. Flowering glumes glabrous or pubescent on 

 the nerves, 5 to many nerved. 



4. Flowering glumes 5-nerved, pilose on 



the nerves, not awned (64) Poa 



4. Flowering glumes mucronate or 

 awned, rounded dorsally, 5-nerved : 

 top of the ovary villous ; inflores- 

 cence paniculate (65) Broinus 



4. Flowering glumes many, awned or 

 mucronate, 7 to 9 nerved ; inflores- 

 cence spicate . _ (66) Bravlurpodium 



Tribe XII. HORDED. 



1. Glumes with their backs turned to the hollow surface of the 



rhachis ; maratime grasses (Ql) Moiivrma 



1. Glumes with their sides turned to the hollowed surface of 



the rhachis; cultivated grasses (68) Trilivunt 



Tribe XIII. BAMBUSE.^:. 



1. Fruit a true caryopsis with a delicate pericarp. 



2. Filaments free: palea of the upper flower 2-keeled-- (69) Bainbusu 



2. Filaments united into a tube; all the paleas 2- 



keeled (70) Gu/antucMoa 



1. Fruit a nut with a thick free pericarp. 



2. Spikelets very small, ovate (72) Dinochhxi 



2. Spikelets elongated, linear or linear-lanceolate ill) Schizostachijnin 



Tribe I. MAYDE.S. 



Tbe staiuiiiate sjiikelcts ofcupyiiiii- the ii|)pt'r portion of tbe iiiiiores- 

 eence or of its divisions, the pistillate below. (Jrain clliijsoid or roundish, 

 iinfurrowed. ("ulnis tall, with ]titli. 



(1) EUCHLAENA .Sclmul. 



Staniinate spikelets in a terminal paniele, two at eaeh joint of the 

 rhaehis, one sessile, one pedicellate; shinies niembranous. Pistillate 

 si)ikelets in l^-ranked spikes, tlie spikes fasciculate in tlie leaf-axils, the 

 axis jointed. Tall annuals with very l)road leaves. 



S]H'cies 1 or 2. IMf.xicaii, 1 intioduccil into tlic Pliilippincs. Tcosiiitv. 



(1) Euchlaena luxurians Sclnad. liid. Seiii. Hoit. (Jott. (18:52) e.x l^iiniaca 

 8, Litterbl. 2.5; Fomnicr in Bull. Soc. Bot. Bclg'. 15: 4()7 ; (4ram. M(>x. G9; C'urtiss' 

 Bot. Mag. i. (I'll.'i. 



Luzon, Province of Bataan, Laniao {Whit ford), April, 1!)04. 



Cultivated only; introduced from America in the year 1!)03; a native of Mexico, 



