160 Ewart and Morrison: 



Pici'ALOSTYLKS LABICHKOIDKS, R. Br., vai'. iniciophylla, ii. vnv. 



Forty miles west of Lander's Creek, civ.. G. F. Hill (No. 364), 

 23/6/1911. The stems and leaf-rhachis of this variety are stouter, 

 more rigid, and almost spinescent, terete and covered by a dense 

 hoary coating of hairs. The leaflets reach to 41 in number, and 

 are broadly obovate and retuse or even obcordate, thinly pubescent 

 on lower surface and glabrous above, measuring 2-4 mm. in length 

 by les.s than 3 mm. in breadth. The sepals are thinly pubescent, 

 and are longer and l)r(»ader (13 by 3 mm. max.) than those of No. 

 133, var. cassioides. in which, however, the petals are larger, and 

 the leaflets reach 45 in number. 



In the form No. 233, which is almost glabrous, the leaflets are 

 mostly 5-6 mm. long, with the terminal one 8-9 nmi. Numerous 

 intermediate forms connect the small-leaved varieties with the 

 fully-developed type. 



The var. cassioides described by Bentham (from Sturt Creek and 

 Gulf of Carpentaria) is represented in the Melbourne Herbarium 

 by specimens from Sturt Creek and Nicholson River, both collected 

 by F.v.M. in 1856, but neither has the varietal name added on the 

 labels. On the other hand a specimen of var. microphylla (from 

 Mt. Churchman, W.A. , Young) is labelled by the Baron, evidently 

 in error, "var. cassioides," but in it there are between 50 and 60 

 leaflets, measuring only 2-3 mm. in length, hirsute, and with a 

 recurved blunt point. Another specimen, collected by Giles shows 

 the rigid and almost spinescent character, while two specimens 

 from the upper Ashburton River, W.A. (Cuthbertson. 1888) indi- 

 cate, the one, a development approaching the typical, and the othei 

 a sciubby form similar to v. microphylla in the size of the leaf. The 

 leaf development may be taken to indicate the nature of the water 

 supply, the small-leaved forms being found in arid surroundings; 

 although the bed of a river where moisture is retained in the mud 

 and gravel, produces in the driest season the fidly-developed form 

 in flower, while beyond the ovei-hanging banks almost all else is 

 desiccated and dormant. 



PllASKOLUS MuNCiO, L. 



Okey Creek, G. F. Hill (No. 765), 16/2/1912. 



PlTHKCOLOIUUM MONILIFKKITM, Beutll. 



Borroloola, G. F. Hill (No. 582), 12/9/1911; McArthur River. 

 G. F. Hill (No. 582). 



