MACLOSKIE : GRAMINEyE. 203 



apically bifid between 2-toothed segments, awned dorsally, the awn 

 jointed. 



Patagon. ; Fuegia ; Cape Horn. 



ii. D. PULCHRA Nees & Mey. 



Culm erect, 60-90 cm. high. Leaves short, 5 cm. long, convolute, 

 scabrid. Sheaths striate, smooth ; ligules long, acute. Panicles with 2-5 

 slender branches. Spikelets variegated, white-purple and gold. Ghtmes 

 subequal, as long as the flowers. Stipe of the upper flowers usually half 

 as long as the flowers, pilose. Floral glume with praemorsely toothed 

 apex, scarcely awned. 



(Chili); Patagon. 



12. D. TENELLA Phil. 



Culm slender, naked upwards ; upper leaf convolute-filiform. Panicle 

 10 cm. long, 2 rays in each semiverticil. Glumes cuspidate, entire at 

 apex, violet at base ; floral ghime 4 mm. long, 4-toothed, its awn genicu- 

 late, twice as long as the palea. 



W. Patagon., Valley of Rio Palena. 



29. TRISETUM Pers. False-oat. 



Leaves flat ; panicle dense or lax. Spikelets 2 rarely 3-6-flowered, the 

 rachilla produced as a hairy bristle or an imperfect flower. Glumes 

 keeled, the lowest 2 empty and unequal; the floral ghime thinner, acute 

 or bifid, with a dorsal awn, which is usually bent and twisted; palea 

 narrow. 



Species 50, in temperate regions by the Mediterr., many in N. Amer., 

 also in Chili, i each in S. Afr., Madagascar, Himal., the Orient, and 

 N. Zeal. 



KEY TO THE SPECIES. 

 A. Spikelets 2-flowered. 



b. Panicle in a spathe, or protruding. Leaves^lanceolate. Awn twice as long as its flori- 



glume. (One of the flowers of a spikelet is easily lost.) fraudulentum. 



b2. Panicle lax. 



c. Panicle large. Leaves broad, long-sheathing. Floriglume 3-4 -toothed ; awn straight, 



not long. dozei. 



c2. Panicle broad, dense, short. Floriglume 2-aciculate, awned. aureum. 

 A2. Spikelets 2-3-flowered. 



b. Panicle lax, long, nodding, its rays fasciculate. Leaves linear. Spikelets 6 mm. long. 

 Awn bent. cernuum. 



