1854 CLIII. GRAMlKEJl. [JsctonMrn. 



twisted and bent awn, attenuate or hyaline and bifid at the base as in Andropocfon. 

 Palea small and thin or none. Styles distinct. Grain enclosed in the glumes 

 but free from them. 



The genus is chiefly Asiatic with a few tropical African and American species. 

 Spikelets both 2-flowered and awned. Outer glume rigid. Spikes 2 or 3, 

 rarely 4, erect, often appressed so as to appear like 1 cylindrical spike. 

 Nodes bearded. Stems 2 to 3ft. high. Awn exserted. , t < ■,• 



Spikes 3 to 4in., spikelets 4 to 5 lines long I- -f- tnticeum. 



Spikes IJ to 3in., spikelets about 3 lines long • . • 2. J. australe. 



Nodes bearded. Stems creeping or diffuse, shortly ascending. 

 Glabrous. Ehachisof the spike not ciliate. Outer glume winged at the 



top. Awn concealed in the spikelet 3. I. muticum. 



Sessile spikelet 2.flowered, awned. Pedicellate spikelet unawned, with a male 

 or Without any flower. ,. j 



• Spike rigid. Articles of the rhachis and pedicels ovate, convex, smooth and . 



shining resembling sessile spikelets . . . ; 4. I. fragiM, 



Spike solitary. Pedicellate spikelets lanceolate, flattened, with 2 male 

 flowers 5. I. laxum. 



1. I. triticeum (Triticum-like), R. Br. Prod. 205 ; Benih, Fl. Austr. vii. 

 619. Very near I. muticum, but a coarse plant, ascending to 2 or 3ft. Leaves 

 mostly long and broad, contracted at the base or scarcely cordate, glabrous or the 

 lower sheaths hairy. Spikes 2 together, 3 to 4in. long. Spikelets 4 to 5 lines 

 long, more acuminate than in I. OTitiicMm. Outer glume smooth and shining at 

 the base, several-nerved and often ciliate with a few hairs at the end, the wings 

 of the lateral nerves often unequal ; inner glumes rather rigid, the 3rd with a 

 rigid palea and male flower, the 4th under the terminal flower more hyaline, 

 shortly 2-fid, the awn usually exserted and sometimes fin. long. Pedicellate 

 spikelet nearly similar, but as in I. muticum rather narrower, the wings and 

 nerves irregular, and the awn often shorter. — Andropogon triticifurmis, Steud. 

 Syn. Glum. i. 376. 



Hab.: Keppel and Shoalwater Bays and Broadsound, -R. B)'om;k ; Endeavour, Eiver, A. Cun- 

 ningham; Cape Ydrk and Port Curtis, M'Gillivray ; Moreton Bay, F. v. Mueller. 



2. I. australe (Australian), R. Br. Prod. 205 ; Benth. FL Austr. vii. 519. 

 Stems from a shortly decumbent base or creeping rhizome erect, 2 to 3ft. high, 

 but not stout. Leaves rather narrow, glabrous or slightly hairy in the typical 

 form, the nodes always bearded, the upper sheaths very long. Spikes 2 together 

 on a long peduncle, sessile and erect, IJ to 3in. long, the rhachis and pedicels 

 slightly ciliate. Spikelets 3 lines long or scarcely more ; otherwise the same as 

 in I. triticeum. Awn of the sessile spikelet J to i'm. long, of the pedicellate 

 spikelet shorter or reduced to a short point. — Andropogon eryptatherus, Steud. 

 Syn. Glum. i. 376. 



Hab.: Brisbane Eiver, Moretan Bay, F. v. Mueller, C. Stuart ; also in BidwilVs collection. 



The glumes of this and other species of the genus are often infested with the fungus 

 Cladosporium herbarum, Link. 



Var. villosum. Leaves more hairy and very scabrous. Ehachis and pedicels of the spikes 

 densely ciliate with long hairs and the spikes often above 3in. long. I. villosum, B. Br. Prod. 

 205 ; Andropogon villiferus, Steud. Syn. Glum. i. 376. 



Hab.: Goold Island, M'Gillivray ;■ Mount Wheeler, Thozet. 



8. I. muticum (pointless),- Linn.; Kimth, Enum. i. 512 ; Benth. Fl. Austr. 

 vii. 520, Stems diffuse or creeping at the base, ascending to from 6in. to above 

 1ft., rather stout and leafy to the inflorescence. Leaves lanceolate, rather short, 

 often cordate at the base, quite glabrous, the upper one reduced to a sheathing 

 bract very near or close to the spikes. Spikes 2 together but sessile erect and 

 closely appressed so as to appear like one thick cylindrical spike of 1 to 2in., the 

 rhachis and thick pedicels quite glabrous. Spikelets about 3 lines long. Outer 

 glume of the sessile one paleaceous, broad, obtuse acute or mueronate, several- 

 nerved, the 2 lateral nerves winged towards the top, 2ad glume narrower thinner, 



