the floriil ^'luinc often adlioros mori' or less, whilst there ure several 

 true FestucdH where it is (|uite free. 



Alorit of the rtpecieri wiilely dispersed urc very variable and diHi- 

 cult to define. Ueiitiiani ])roj)()ses no sections for the genus, hut 

 refers to some proposed by ('. Koeh; 



1. J*Kviii/ojt()ii, si)ikelets very small and with nearly the liabit of 

 Arp/iehic/i/od. 



2. Lcuropoa (Jriseb., spikelets rather larger than usual, and 

 with glumes soineAvhat searious and shining. 



3. Dioiruj)oa Desv., K])ikt'lets usually, possibly not always, dia>- 

 cious. As will bo seen, I have nuule a jturely artificial key for our 

 species of PiKt. 



A. First empty glume 1 -nerved, annuals (a) 



u. Ligule 'l-'i mm. long, spikelets 3-r-ilowered, tloral 



glume y-l> mm. long 1 



a. Ligule 'I mm. long, spikelets '^-4-llowered, floral glume 

 3 mm. long ?. 



B. First empty glume 1-nerved, jjerennials (a') 



u'. Upper ligule 5-0 mm, long, rays in sets of ')-(;. lloral 



glume '^.5-3 mm. long 3 



a'. Upper ligule 5 mm, long, rays 3-4, lloral glunu' 



5,5-6.5 mm. long 4 



a'. Upper ligule 4 mm. or less in length (b) 



b. Floral glume mm, long; both emptyglunu's 1- 



nerved 5 



b. Floral glume 4, '-2-5 mm. long, ligule 'J-3 mm. long 

 b. Floral glume less than 5 mm. long, except some 



of no. 1(3 (c) 



c. Ligule O.T mm. long, rays in twos, Horal glume 



2.7-3.3 mm. long 7 



C. Ligule 1 nnn. long, rays 2-4, floral glume 4 



mm. long, upper leaf 1.5 cm. long 8 



c. Ligule 1 nnn, long, rays ',)-'k floral glume 3.5-4 



mm. long 9 



c. Ligule 1-2 mm, long, floral glume 3-4,5 mm. 

 long 10 



