A Revision of the Western Australian Species of Triodia R.Br. 
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ones agree so closely with those described for T. Cunninghamii Benth., that 
this name is regarded as a synonym of T. pungens. There are, however, 
intermediate sizes so that it is not possible to make a variety. 
This form is only found on the grey sand and loam soils of the coastal 
plain along the 80 Mile Beach. 
Group ( b ) has two forms : — 
(vii) Runner Spinifex. Practically the whole of the plant is made up of 
long stolons. In one place a tussock was seen which was more than three 
metres in diameter but the possible range varies down to a metre. The panicle 
has no very special characteristics except that the glumes are usually longer 
than the three lowest lemmas instead of as long as the lowest lemma but 
this may not be constant. The leaf blades are scabrid and open when growing. 
This form was found in rather small patches all through the plains coun- 
try along the De Grey River. It grows on country adjacent to the rivers 
but not actually along the banks. It appears to set very little seed and does 
not regenerate easily like the first four forms. 
(viii) Pindan Spinifex. The growth form is very like that of (vii) but 
there is a cushion tussock with radiating stolons. It is fairly resinous and 
there are no special panicle features. 
This type is mentioned as it occurs in a different ecological community. 
Spinifex pindan is an Acacia — tussock grass association. Either Triodia 
or Plectrcichne is found in the lower stratum. Spinifex pindan occurs in the 
“ desert ” country inland from the coastal plain of the 80 Mile Beach and to 
the north of the De Grey River. Form (viii) appears to be less palatable 
to sheep than is (vii). 
Distribution. — Anna Plains, Burbidge ; Nalgi, Burbidge ; Wallal Downs, 
Burbidge ; Pardoo, Burbidge ; De Grey Station, Burbidge also Anderson : 
Poondanah Siding, Burbidge ; Port Hedland, Fitzgerald 64, 1558 ; Shaw 
River, Anderson (Burbidge No. 465) ; Mulyee Station, Anderson (Burbidge 
463) ; Coongan Station, Anderson also Melville also Burbidge ; Warralong 
Station, Anderson , also Melville also Burbidge ; Gorge Range, Burbidge ; 
Soda Creek, on Coongan Station, Burbidge ; Muccan Station, De Grey River, 
Burbidge ; Kitty’s Gap, Burbidge ; Eginbah Station, Burbidge ; Marble 
Bar, Burbidge ; Mount Edgar Station, Burbidge ; Stony Hills to south of 
Mount Edgar, Burbidge ; Meentheena Station, Blair ; Dampier Archipelago, 
Walcot ; Nichol Bay, Sewell ; Roebourne, Polak ; Warambie Station, Roe- 
bourne, H. G. Mecires ; Ashburton River, Morrison ; Cane River, Gardner 
3074, 6238 ; Beadon, Gardner 3069, Port Sampson, Gardner 1638. 
Triodia Wiseana C. A. Gardn. in Journ. Boy. Soc. W. Aust. xxvii 166: 
1942. 
This species can be identified by the peculiar hairs developed on the auri- 
cular ridge, at the top of the leaf sheath, and along the margin of the lower 
portion of the lamina. The lemmas have three acute lobes and the nerves 
are visible in the basal portion as well as in the lobes. The paleas have a 
well developed wing on each nerve. 
Culms ascending in dense tussocks ; internodes short, glabrous and 
smooth ; branching from the upper nodes. Leaves rigid, divaricate, with 
glistening hairs 4-6 mm. long developed on the auricular ridge at the top 
of the sheath and along the lower part of the lamina. The hairs arise in 
