56 Some hitherto unknown Australian Plants. 



Zornia chcetophora. 



Glabrous, densely dotted with glands; stems erect, perennial, 

 many branched; leaflets twin, long or narrow lanceolate, 

 acute ; stipules minute, triangular-lanceolate, acumi- 

 nate ; spikes terminal, on long peduncles, with numerous 

 flowers ; bracteoles lanceolate, almost five-nerved, with 

 slightly ciliated apes and an acute protracted base ; 

 pods 3-5-jointed, with copious long upwards scabrous 

 bristles, and also hispid; joints broad-semiorbicular ; 

 seeds quite smooth, shining, brown-black. 



On sand ridges and on the sandstone table-land in the 

 interior of Arnhem's Land, and thence towards central Aus- 

 tralia. 



A herb 1-2 feet high, with many dichotomous, slender 

 stems. Petioles often an inch long. Leaflets 1-1^" long, 

 1-4'" broad. Peduncles 2-5" long, erect, or slightly spreading. 

 Bracteoles 3-4"' long. Flowers yellow. Calyx membraneous, 

 whitish, ciliate, on the lower side somewhat downy. Stamens 

 only towards the base connate. Anthers of the shorter fila- 

 ments oblong-linear, of the longer ones ovate. Joints of the 

 pod 1|" long. Seeds measuring 1 line. 



Composite. 

 Pluchea. Cass. 



(Sect. Oliganthenram.) 



Involucre cylindrical, with narrow-lanceolate scales. Female 

 flowers 2-3, hermaphrodite sterile ones 1-2. Pappus 

 bristles of the fertile acheniums numerous, indistinctly 

 biseriate ; those of the barren acheniums with no or 

 only one or two bristles. 



Pluchea filifolia. 



(Oliganthenram filifolium, Ferd. Miieller's herbar. North Austr. Expd.) 



Annual, glabrous ; leaves thread-like ; flowerheads axillary 

 and terminal; hermaphrodite flowers three -toothed, 

 female ones with an exceedingly narrow ligule ; fertile 

 acheniums densely fulvous-silky. 



In arid localities in the south-eastern part of Arnhem's 

 Land. 



