MACLOSKIE: GRAMINE/E. 181 



2. S. INDICUS R. Br. 



Stout, erect, glabrous, 3-12 dm. tall, tufted. Leaves long, attenuate to 

 a slender point ; their ligules a ring of short hairs. Glumes i and 2 unequal, 

 half as long as the floral glume. 



(N. and S. Amer., Brit. & Br., i, 154.) N. Patagon. 



21. POLYPOGON Desf. Beard-grass. 



Mostly decumbent annuals with flat leaves and usually spike-like pan- 

 icles. Spikelets i -flowered ; glumes 3, all awned ; nos. i and 2 empty, no. 

 3 smaller and subtending a shorter palea and its flower. Stamens 1-3. 

 Grain free, enclosed in the glume and palea. 



Species 10, extra-tropical. (Brit. & Br. i, 157.) 



i. P. CHOXOTICUS Hook. f. 



Panicle large, oblong ; its branches smooth but its pedicels rough. 

 Leaves shorter than their sheaths. Glumes pubescent, obliquely truncate 

 with awns twice as long as the flowering glume, which is 5-nerved and 

 5-awned. 



Chonos Archip. and Cape Tres Montes. 



2. P. ELONGATUS H. B. & K. (P. littoraUs Smith.) 



Culm simple, nodes glabrous. Leaves rough-margined. Panicle nar- 

 row, 10-30 cm. long, heads if larger nodding. Rays numerous, slender. 

 Spikelets 2.5 mm. long. Glumes hispid at the nerve, aculeate to a seta. 

 Floral glume half as long, bearing a seta. Palea shorter. 



Eurasia ; S. Amer. 



3. P. ELONGATUS PATAGONICUS Speg. 



Panicle more lax than in the type, subinterrupted, purpurascent, more 

 or less sheathed by the upper leaf. Ligule short, toothed. Aivn thrice 

 as long as its glume. 



S. Patagon., by R. Sta. Cruz; Chubut. 



4. P. MONSPELIENSIS Desf. 



Panicle densely spike-like. Glumes 2 mm. long, obtuse, bifid, scabrous. 

 Flowering glume shortly erose-truncate. (In tropics and temperate parts 

 of both hemispheres.) 



