FESTUCE^. 463 



"b. Panicle spikelike. . . . 3 



b. Puuicle at length open,, second glume 2.5-3 mm. 



long (c) 



c. Panicle 30 cm. long 4 



c. Panicle 10-14 cm. long 5 



a. Floral glume more than 3 mm. long (d) 



d. Panicle at length open (e) 



e. Panicle 2-10 cm. long 6 



e. Panicle 10-15 cm. long 7 



e. Panicle 20-40 cm. long 8 



d. Panicle capitate or spicate (i) 



i. Culms 3-10 cm. high, blades 1-3 cm. long. . 9 

 i. Culms more than 10 cm. high, blades more than 



3 cm. long (m) 



m. Second glume 3 mm., floral glume 4 mm. 



long 10 



m. Second glume 3.5-4 mm., floral glume 4.5 



mm. long 11 



m. Second glume 4.5 mm., floral glume 3-3.5 



mm. long 12 



m. Second glume 4.5-5 mm., floral glume 5 



mm. long 13 



m. Second glume 5-6 mm., floral glume 4 mm. 



long 14 



m. Second glume longer, floral glume usually 



longer (n) 



n. Panicle dense, 4-6 cm. long 15 



n. Panicle slender, 10-20 cm. long. . . 16 

 1. S. trinerviglumis (Muuro) Kuntze, Eev. Gen. PI. 2:789 

 (1891). Tricuspis trinervighimis Munro. A. Gray, Proc. Acad. 

 Sc. Phil. 333 (1863.) 



An erect tufted rather slender grass, 40-60 cm. high. Sheaths 

 about as long as the internodes, ciliate at the throat; ligule a mere 

 brown ciliate ring; blades of the culm 3, scabrous, with scattering 

 hairs, flat or involute, slender pointed, 1-2 cm. long, 2-3 mm. wide. 

 Panicle spikelike, interrupted, the appressed lower spikelike rays 



