FKSTrCK.E. 0(){> 



3. Zeohromns Griseb. — spikelcts usuully hroad luid thick, the 

 floral glume awuecl, and the nerves of all the gluine.s more numer- 

 ous than in the preceding sections. 



4. Ceratochloa DC. (or lieauv.). — spikes Hat, not uidike those 

 of Vniola, but at length often thickened as in Zeobromiis, iloral 

 glume scarcely notched at the end, and the awn very short. 



Tiie following artificial key nuiybe J'ound easier for the student 

 than the sections al)ove named: 



A. Panicle densely obovate-cuneate 1 



li. Panicle otherwise than the above (a) 



a. Floral glume 23-27 mm. long, awn 35-45 mm. long . 3 

 a. Floral glunui about 20 mm. long, awn 4-8 mm. long. 3 



u. Floral ghnne shorter (b) 



b. Panicle 5-10 cm. long; Iloral glume about i.S mm. 



long, awn 20-25 mm. long 4 



b. Panicle 13-18 cm. long; iloral glume 9-10 mm. 



long, awn very short or 5 



b. Panicle 15-18 cm. long; floral glume 11 mm. long. G 

 b. Panicle 15-25 cm. long; Iloral gume 16-10 nmi. 



long, awn 20-30 mm. long T 



b. Panicle 15-30 cm. long; Iloral glunu' 15-17 mm. 



long, awn 5-12 mm. long S 



b. Panicle about 30 cm. long; Iloral glume about 14 



mm. long, awn 5 mm. long *J 



b. Panicle 8-18 cm. long; floral glume 10 mm. long. 



awn 3-5 mm. long 10 



b. Panicle 5-15 cm. long; floral glunu' 13 mm. long, 



awn 4-0 mm. long 11 



b. Panicle about 30 cm. long; iloral glume about 



10-14 mm. long, awn 20 mm. long. Var. vutjor. 10 

 b. Panicle 15-20 cm. long; floral glume 12-18 mm. 



long, awn 2-4 mm. long 13 



b. Plant otherwise than those above (c) 



c. Branches of panicle drooj)ing; spikelets smooth, 

 flat, oval; floral glume broad-oval, awn 1 mm. 

 long or less IS 



