Flora of Australia. 157 



Lander Creek. N.T., about 21 deg. S. Lat., and 132 deg. E. 

 Long.. G. F. Hill, No. 374, 25/6/1911; also Ashburton River. N.W. 

 Australia. Stuart Carev, 1883. 



The plant poisoned 120 cattle in one night at the Ashlnutou 

 River in 1905, and some settlers recognised it as a reputed poison 

 plant seen by them also in the Kimberley District, further north. 

 The aiea <>t' its distribution is, therefoi-e. vei-y extensive. 



IXDKiOFER.\ BREVIDENS, Beuth. 



G. F. Hill. 1911. 



Indigofera exneapiiylla, L. 

 Sixty miles nortli-east of cii., G. F. Hill (Nos. 285 and 287), 

 7/6/1911. 



IXDKiOFERA IIAPLOPHVLLA, F. V. iV] . 



Sandstone ranges, near Western Creek. G. F. Hill (No. 772),. 

 16/2/1912. 



Indigofera linifolia, Ketz. 

 Hermansburg, Finke River. G. F. Hill. No. 83. 13/3/1911. 



Isotropis argentea, Ewart and Morrison. 



Flowers in axillary racemes, petals yellow, of about equal length, 

 keel beaked, pod oblong, obtuse, seeds numerous, smooth. 



A slender, few-branched undershrub. \^ feet high, the whole 

 plant clothed with an indumentum of appressed shining hairs. 

 Leaves unifoliolate. articulate on a very short petiole, narrow 

 linear, flat but closely induplicate, subacute and recurved at distal 

 end, in length up to 5 cm. x 0.3 cm. broad, the stiff silvery hairs 

 more dense on under surface. Stipules subulate and shoi-t. 



Racemes short, axillary or terminal, flowers few or solitary, 

 peduncles 6-8 mm., with a pair of narrow lanceolate bracts at articu- 

 lation near or above middle, and similar l)ut smaller bracteoles close- 

 to calyx, which is about 7 mm. long, two lipped, lobes at least twice 

 as long as tube, lanceolate, the upper pair united higher up, form- 

 ing a broad lip, the lower lobes curving over the prominent keel. 

 Petals yellow, about as long as calyx, standard on a very short, 

 broad claAv, ovate, obtuse, wings slightly shorter, oblong, mem- 

 branous near base, keel as long as standard with a very slender 

 claw, sharply incurved and broad and membranous below the 

 straight beak. Pod sessile, densely pubescent with stiff erect hair» 

 brown on young pod at first, but yellowish on mature pod. which 

 is turgid, oblong, obtuse with a minute recurved blunt point, 2.1 



