Some hitherto unknown Australian Plants. 59 



ligule, apparently white. Achens fulvous, scarcely longer 

 than half a line. Pappus white. 



Amongst Indian species nearest to E. Wightii, otherwise 

 resembling E. Philadelphicum and purpnreum. 



Ozothamnus decurrens. 



(Sect, jjuozothamnus.) 



Leaves linear, short, spreading, truncate, with entirely revo- 

 lute margin, in a double line decurrent, wrinkled, rough, 

 shining; corymbs compound, terminal; flower-heads 

 ovate-cylindrical, at last bell-shaped, yellowish-white, 

 homogamous, with about 11 flowers; scales of the invo- 

 lucre blunt, with sbghtly tomentose back and hyaline 

 margins ; achenes scabrous-papillose ; bristles of the 

 pappus 21-25, a little thickened at the apex. 



In the desert scrubs on the Murray and Darling rivers, 

 and near Lake Alexandrina. 



Branchlets angular and green, on account of the decurrent 

 leaves. The latter generally only from 2-4 lines, sometimes 

 half an inch long, hardly 1 line broad ; the velvet of their 

 lower page only visible in the midrib. Peduncles thinly 

 tomentose. Flowerheads scarcely 3 lines long. 



It differs from Ozothamnus retusus in shorter, more 

 wrinkled leaves, with broader decurrent lines, in neither 

 shining, nor glabrous, nor heterogamous flowerheads, and in 

 more copious pappus-bristles. 



Oz. adnatus, to which Dr. Sonder referred this plant doubt- 

 fully in the Linnaea, 1852, p. 511, differs, according to D. 

 Candolle's note of that species, in shorter and appressed 

 leaves, and in ovate scarcely yellowish flowerheads, being 

 besides not a desert plant. 



AsCLEPIADE^E. 



Bidaria erect a. 



Stems erect, shrubby; branches with appressed hair ; leaves 

 linear, nearly sessile, glabrous or somewhat ciliate at the 

 margin; umbels on very short peduncles, solitary or 

 twin; flowers small; faux of the corolla bearded; stigma 

 conical, longer than the stamens ; follicles nearly terete. 



On stony ridges along the Victoria River. 



A shrub several feet high. Leaves from 2 to 4 inches long, 

 1-2 lines broad. Corollas nearly white. 



