PAXICK.K. 105 



Mllh'f), P. rnhnium {Shama MiUet), form important articles of 

 food f<tr man and domestic animals. 



A. Dkutvuia (Heist. i\< a <fcnus). Spi'irle/s rroin/nf .?—i fn- 

 (ji'ther. nnisthj in /xn'rs. aJoiKj llie outer or /oiirr i<i(/f of simple 

 clustered l-sidvtl spik'es on s/iort jiedirels of inieiiiial lemjlh ; 

 outer glume rery snuill or obsolete : root most hi aittiual. Some 

 s|iecics arc very closely allied to I'aspahnii. 



a. Spikes erect, racliis less tlian O.o mm. wide 1 



a. Spikes spreading,', rachis le.s.s than O.o mm. witle. . . '2, '.i 



a. Spikes spreading, racliis abont I mm. wide (!>) 



1). Spikelets ol»lon<r. acute, about :> mm. long. ... 4 



b. Si)ikelets elliptical or ovoid. . . * (c) 



c. Leaves smooth, o-4 mm. wide 5 



c. Leaves hairy, 't-7 mm. wide <"> 



B. TRirn.vt'HN'R (Xees as a genus). Spik-ehis jxniieled. ,silk\>f- 

 lidini. narrow, slmder. chistrred or nirel/f in pairs alonrf tlie 

 rarfn's of t/te J-fetr lonff ereet brauehes : fruit imj ijhinie not 

 aiueh hardened. Species f 4- le 7.8,1) 



C. Hu.vcillARiA ((fri.seb. as a irenus). Spik'elets a/rnless, sinr/te or 

 in twos and t/treea, J-^-seriate along simple spik'es Ixirne on tlie 

 axis. Xearlg idlied to Paspaluni. differing f root tliat f/enus in 

 /taring a small first or lower gin/ne. Shading otf with .some of 

 the sparingly-flowered species into Eupanieum, comprising 

 many spe( ies. 



a. Spikelets single and in two rows (b) 



b. Spikes 4-<> cm. long 10. 11 



b. Spikes \-'.\ cm. long (c) 



c. Spil:es 4-S approximate \l 



c. Spikes S-l'.* on about 10 cm. of the axis. . . . \'.\ 



c. Spikes lO-lo on 20-30 cm. of the axis .... 14 



a. Si)ikelets in twos or threes (b) 



b. Spikes appressed. the lowest often not overlapping . (c) 



c. Plant tall, erect 1,5 



c. Plant creei)ing 1(5 



b. Spikes spreading, imbricate (c) 



c. Peduncles about 0,5 mm. diam 17 



