32 THE FLORA OF THE NORTHERN TERRITORY. 



A. punctatus, Roxh. ; A. brevif alius, Sw. ; A. micranthus, Kunth ; A. 

 serratus, Thun. Recorded in National Herba,rium Census from North Australia. 



Some of the species of Andropogon are excellent fodder plants, while some 

 have produced valuable oils. 



10. ANTHISTIRIA, Linn. 1779. 



(Androscepia, Brogn., 1829 ; Aristaria, Jungh., 1840 ; Exotheca, Anderss., 

 1856; Germainia, Balansa and Poitras, 1873; Heterelytron, Jungh., 1840; 

 Iseiiema, Anderss., 1856; Perobachne, PresL, 1830; Themeda, Forsk., 1775). 

 The 4-whorled barren spikelets sessile. Awn very long and rigid. 

 Spikelets in dense compound clusters, sessile within the bracts. 



Bracts glabrous. Barren spikelets glabrous or sprinkled with 

 long ciUa. Fertile spikelet glabrous or shortly pubescent at 

 the end. — 3. A. imberbis. 

 Bracts sprinkled with long spreading hairs. Spikelets nearly of 

 A. imberbis. — 1. A. frondosa. 



Spikelets with the surrounding barren ones on slender.pedicels within 

 the sheathing bracts. Barren spikelets glabrous. Fertile one 

 densely villous with brown hairs. — 2. A. gigantea. 



The four-whorled barren spikelets pedicellate ; all the spikelets glabrous ; 

 awns very fine. — 4. A. membranacea. 



1. A. frondosa, E. Br. — ^Recorded. Islands off the North Coast, R. 

 Brown ; Arnhem's Land, F. v. Mueller ; Port Darwin, Schultz (Nos. 155, 

 180, 217). 



2. A. gigantea, Cav. (A. avena^ea, F. v. M.). — 15 miles E. of Hermans- 

 burg Mission Station, Finke River, G. P. Hill (No. 100), 29/3/1911. 



Recorded. Upper Victoria River, F. v. Mueller. 

 Oat Kangaroo Grass. 



3. A. imberbis, Retz. {A. ciliata, Linn). — Five-mile Bar, MacArthur 

 River, G. F. HiU (No. 718), 19/1/1912. 



Edith Creek, Gilruth and Spencer, Juty- August, 1911. 

 Henbury Station, Finke River, G. F. Hill (No. 48), 10/3/1911. 

 Kangaroo Grass. 



4. A. membranacea, Lindl. — Tanumbirini, G. F. Hill (No. 815), 26/3/1912. 

 Newcastle Waters, G. F. Hill (No. 472), 17/7/1911. 



Recorded. Sturt's Creek, F. v. Mueller, Gregory ; Nichol Bay, Mrs. 

 Crouch. One of the best grasses for stock. 



11. TRAGUS, Hall. 



1. T. racemosus Hall. (Lappago racemosa Willd.). — Sturt's Creek, F. v. 

 Mueller. 



Small Burr Grass. 



12. PEROTIS, AiT. 1789. 



{Xystidium., Trin. 1820). 



1. P. latifolia. Ait. (P. rara, E. Br.). — Bauhinia Downs to Tanumbirini, 

 G. F. Hill (No. 816), 25/3/1912. 



Margin of Claypan, Chewing's Well, G. F. Hill (No. 404), 1/7/1911. 

 Comet River Grass. 



