A Revision of the Western Australian Species of Tr:od a R.Br. 19 1 
Lower glume one nerved. Lowest lemma 
2-4 mm. long 
Spikelets pedunculate. Nerves of the palea 
winged. 
Lemmas thin, scarious. Glumes obtuse Fitzgeraldii 
Lemmas indurate. Glumes acute or 
acuminate .... .... .... .... longiceps 
Spikelets sessile. Nerves of palea not 
winged. Glumes acuminate or aristulate. 
Lemmas glabrous or with few hairs. 
Sheath orifice without auricular ap- 
pendage. Leaves glaucous .... .... angusta 
Lemmas pubescent on back and along 
margin. Sheath orifice with fringed 
appendage. Leaves not glaucous .... secunda 
Species. 
Triodia Basedowii Pritzel in Fedde, Report xv. 356 (1918). 
This species differs from T. lanigera Domin in the obtuse lateral lobes of 
the lemmas, the membranous palea and more obtuse glumes. It may be 
distinguished from T. pungens R. Br. by the woolly not resinous leaf sheaths. 
It forms a dense tussock which, owing to the death of the older central 
parts, may become annular or crescentic. Culms erect or more or less ascend- 
ing ; internodes short, branches at the upper nodes. Leaves rigid, sheaths 
woolly-tomentose, especially towards the junction with the lamina, sometimes 
becoming almost glabrous ; ligule a row of woolly hairs shorter than the to- 
mentum of the auricular ridges, the latter hairs continued onto the base of the 
base of the “ petiole ” ; the lamina is conduplicate, pungent pointed, minutely 
striate owing to ridges of tissue developed above the nerves, glabrous, 5-25 cm. 
long, 1 • 5 mm. wide, the petiole-like base 2-4 mm. long. Panicle narrower 
and shorter than in T. lanigera , with fewer spikelets ; 8-12 cm. long. Spike- 
lets spreading and truncate, pedunculate on the short panicle branches. Glumes 
enclosing the lemmas and almost as long as the spikelet, lanceolate or oblong, 
obtuse or shortly acute, membranous and becoming scarious, 9-13 nerved, 
the central nerve reaching the apex, equal in size, 6-10 mm. long, 3-4 mm. 
wide, minutely scabrid and slightly ciliolate towards the apex or quite glabrous 
and entire. Lemmas 5-8 per spikelet, the lower 3-5 fertile and hermaphrodite, 
lateral lobes obtuse, central lobe more or less acuminate, lateral lobes 4 mm. 
long, central lobe 5 mm. in the lowest floret, whole lemma softly pubescent 
and the margins of the lobes ciliolate. Palea obovate or oblong, the apex 
incurved over the floral organs, minutely pubescent, nerves scabrid, texture 
membranous. (PI. I., fig. 1.) 
So far as is known this is a useless species like T. lanigera. It is wide 
spread in the southern north-west and arid interior to the South Australian 
border. 
Distribution.- — Lake Way Station, Wiluna, Melville ( Burbidge No. 451) ; 
north-east of Wiluna, Stewart ( Burbidge 446) ; 60 miles east of Meekatliarra. 
Gardner , 2367 ; Sandstone, Gardner ; locality unknown, Hann, 1903. 
