■24 
Nancy T. Burbidge. 
groups from small swellings. The ligule is a row of short hairs. The lamina 
is conduplicate, minutely striate, pungent pointed, 10-20 cm. long, 2 mm. 
wide. Panicle* 6-12 cm. long, loose, and open with spikelets on scabrid capil- 
lary branches. Spikelets 8-10 mm. long. Glumes lanceolate or oblong, apex 
acute or almost aristulate, commonly trinerved but sometimes having axillary 
lateral nerves, subequal, glabrous, indurate, 4-5 mm. long. Lemmas imbri- 
cate, 3-9, indurate, lanceolate with three rigid acute or acuminate lobes from 
half to nearly as long as the entire portion ; three groups of three nerves 
continued almost to the base ; with a row of hairs up the centre of the abaxial 
surface and others along the margins ; lowest lemma 4-6 mm. long. Palea 
oblong 3-4 mm. long, membranous or scarious, nerves winged. The margins 
of the wings usually protrude slightly in the spikelet. 
Gardner’s specimen was, unfortunately, rather immature. The peculiar 
hairs on the leaves, however, showed it to be a distinct form. 
Distribution.— Mount Margaret Pass, Hamersley Range, Gardner 3129 
(type) ; near Mount Rica, Gardner 6422. 
Triodia Wiseanna var. brevifolia N. T. Burbidge var. nov. 
Laminae brevae, 5-9 cm. longae, 1-1 -5 mm. latae. Lemmata indurata, 
lobi acuminati, rigidi, divaricati, 3-nervis. 
Differs from. Gardner’s typical form in its shorter, narrower leaves with 
the marginal and auricular hairs less prolifically developed. These hairs 
are not conspicuous in the field. Apparently when growing they lie parallel 
to the margin. It is only in dried material that they stand out. The lemmas 
are more deeply lobed so that the appearance approaches that of T. pungens. 
However, the nerves are clearly visible in the base of the lemma. (PI. II., 
fig. 4.) 
The variety, like the typical form, is found on stony ground which, in 
the Pilbara area, means the arid slopes of the hills. 
Distribution. — Anna Plains Station, 80 Mile Beach, Burbidge 1438 ; 
Muccan Station, De Grey River, Burbidge 994 ; between Kitty’s Gap and 
Eginbah Station, Burbidge 995 ; Dingo Point, Eginbah Station, Burbidge 
1044 ; between Eginbah and Marble Bar, Burbidge 1062 ; Mount Edgar 
Station, south-east from Marble Bar, Burbidge 1126 ; Nullagine Road south 
from Mount Edgar, Burbidge 1150, 1 152 (type), 1172, 1 176 ; Red Hill north 
of Ashburton River, Gardner 637 ! . 
Triodia brizioides N. T. Burbidge sp. nov. : affinis T. irritanti , a qua lem- 
matibus acute lobatis, glumis aristulatis, laminis glaucis differt. 
Gramen perenne, dense caespitosum. Culmi ascendentes, nodis superiori- 
bus ramosi, multis nodis, glabri, laeves. Foliorum vaginae induratae, laeves, 
glabrae vel sparse tomentosae, pallidae vei stramineae, ligulae ad seriem 
ciliorum redactae ; orificia tomentosa ; laminae angustiores vaginarum, 
bre viter petiolatae, rigidae, glaucae, divaricatae conduplicatae, 5-12 cm. 
longae, 1-5 mm. latae explanatae ; apices piuigentes. Paniculae diffusae, 
5-10 cm. longae ; rhachis scabra, spiculae pedunculatae, bases pedunculorum 
villosae, peduneuli 6-15 mm. longi, scabri. Spiculae lateraliter compressae, 
lineares vel oblongae, pallidae, 10-20 mm. longae, 6-8 mm. latae. Anthoecia 
7—10. Glumae oblongae, concavae, aristulatae, aequales, glabrae, scariosae, 
6 mm. longae, 3 mm. latae, 3-nervis, apices ciliolatae. Lemmata lanceolata 
vel ovata, 9-nervis, basi pubescentis, margine barbata ; infima 5-7 mm. longa ; 
