THE FLORA OF THE NORTHEEN TERRITORY. 41 



26. ORYZA, Linn. 

 1. 0. sativa, Linn. — ^Marshes a.bout Hooker and Start's Creeks, F. v. 

 Mueller. Wild Rice. Produces an excellent fodder, as well as grain. 



27. ARISTIDA, Linn. 1753. 



( Arthratherum, Beauv., 1812 ; Chaltaria, Beauv., 1812 ; Kielboul, Adans., 

 1863 ; Molinsia, Rafin, 1830 ; Ortachne, Nees., 1852-7 ; Schistachne, Figar. 

 and Be Nol., 1832 ; Streptachne, H. B. and K., 1815 ; Trixostis, Eafin, 1830). 



Of very little economic value. Three-awned Spear grasses. Not desirable 

 grasses. 



Section I. Awn articulate on the glume, entire and spirally twisted below 

 the branches. Flowering glume much shorter than the outer ones. 



Awn 2 to 3 in. long below the branches, which are at least as long. — 4. A. 

 hygrometrica. 



Awn about 1 J in. below the branches, which vary from i| to 2J in. — 7. A. 

 stipoides. 



Awn i to f in. below the branches, which vary from 1 to 3 in. — 1. A. 

 arenaria. 



Section II. Awn not articulate and divided to the glume into three 

 branches, the glume itself when barren sometimes twisted but not the awn. 

 Flowering glume about as long or longer than the outer ones. 



Panicle-branches very long, at length spreading, with few spikelets on long 

 jjedicels. Glumes at least ^ in. long. — 5. A. leptopoda. 



Panicle narrow, rather loose. Outer glumes as long as the flowering ones. 

 Glumes scarcely 3 hnes. Awns under J in. long. — 6. A. ramosa. 

 Glumes, 4 to 5 hnes. Awns f to 1 in. long. — 2. A. calycina. 



Panicle narrow, dense. Spikelets sessile and crowded on the short 

 branches. Glumes 3 hnes or the flowering ones rather longer. Awns 4 to 6 

 Hnes. — 3. A. depressa. 



1. A. arenaria, Gaud. — Hermansburg, Finke River, G. F. Hill (No. 56), 

 11/3/1911. 



15 miles E. of Crown Point, G. F. HUl (No.24), 1/3/1911. 

 Nichol Bay, Mrs. M'Croud. 



2. A. calycina, R. Br. — Hermansburg, Finke River, G. F. HUl (No. 74), 

 11/3/1911. 



75 mUes W. of Powell's Creek, G. F. HiU (No. 452). 

 AUoe Springs, G. F. HiU (No. 130), 24/4/1911. With smut. 

 75 miles N.W. of Camp IH., G. F. HUl (No. 344), 14/6/1911. 

 35 miles N.E. of Camp II., G F. HUl. (No. 249), 7/6/1911. 

 Near Hugh River, MaodonneU Ranges, G. F. HUl (No. 138), 4/5/1911. 

 Recorded. Upper Victoria River, F. v. Mueller ; Port Darwin, Schultz 

 (No. 765). 



3. A. depressa, Retz. — ^Lat. 29 degrees 16 minutes, N.T. Survey Route, 

 G. F. HiU (No. 428), 4/7/1911. 



4. A. hygrometrica, R. Br. — Between Borroloola and Tanumbirini, G. 

 F. HiU (No. 822), 23/3/1912. 



GeneraUv on poor sandy country ; useless for stock. 



Borroloola, G. F. HiU, 23/2/1912. On aU higher locahties. 



Northern Territory, Gilruth and Spencer, July- August, 1911. 



Recorded. Arnhem N. Bay, R. Brown ; Upper Victoria River, F. v. 

 MueUer. 



The awns bore into the skins of animals and occasionaUy reach the intestiries, 

 thus causing death. 



