108 PANICACE.E. 



g. Perennial ; liirsute, spikelets 4 mm. long, 



blades 6-10 mm. wide 50 



M. Miliaria Trin. Spikelets obovate or ellipsoidal, obtuse or 

 barely pointed. 



Spikelets with 2 prominent rows of hairs 51 



Spikelets warty, roughened 52 



Spikelets finely glandular on the surface. . . 53, 54, 55, 56 



Spikelets more or less pubescent 57 



Spikelets unlike either of the 4 previous sections. . . (a) 



a. Spikelets about 1 mm. long 58- 



a. Spikelets 1.4 mm. long, blades 20-30 mm. wide. . 59 

 a. Spikelets 2 mm. long, blades 2-4 mm. wide. . . 60, 61 



a. Spikelets 1.5-2 mm. long, blades 5-7 mm. wide. . 62 



a. Spikelets 1.6-1.9 mm. long, blades 1.5 mm. wide. . 63 



a. Spikelets usually more than 2 mm. long (b) 



b. Blades 2.5 mm. wide, strict, panicle small, very 



narrow 64 



b. Blades 4.6 mm. wide, including the bases of the 



narrow panicles, spikelets 2.5 mm. long. ... 65 

 b. Blades 1-2 cm. wide, spikelets 2.5-3 mm. long; 



part of 66 



b. Blades usually 7 mm. or more Avide (c) 



c. Panicle very simple and narrow, spikelets 3 



mm. long, blades 10-15 mm. wide 68 



c. Panicle compound, spi-eading (d) 



d. Spikelets 2.2-2.3 mm. long, plants 90-120 



cm. high, often hairy 69 



d. Spikelets 2.3-3 mm. long, blades 10-20 



mm. wide, plant smooth 67 



d. Spikelets 3 mm. long, blades 7-13 mm. 



wide 70 



d. Spikelets 3-4 mm. long, blades 15-30 mm, 



wide (e) 



e. Sheatlis often hairy 71, 72 



e. Sheaths smooth 73 



H. Lasiaces. Spikelets obovate, bearing a tuft of riUons down at 



