Australian Plants, 



23 



convex and manifestly striated ; margin refract to the beneath 

 very prominent middle nerve ; racemes alternately crowded at 

 the end of the branches, elongate, dense-flowered, calyx outside 

 with pedicels and rhachis grey-pubescent, inside together 

 with the style smooth ; germ en stipitate, tomentose ; stigma 

 ovate, oblique-terminal centrally umbonate ; foUiculi globose- 

 ovate, turgid, hardening, with a short stipes, grey tomentellous; 

 seeds flat, ovate, even, all-around winged with a thin mem- 

 brane. 



In the Mallee scrub on sandhills towards the junction of 

 the Murray and Murrumbidgee. 



Allied to several tropical species, particularly to G. angus- 

 tata (R. Br. suppl. p. 24). 



POLYGONEAE. 



48. Polygonum diclinmn. 



( Sect, Avicularia.J 



Suffruticose, glaucous, perfectly smooth ; stems upright, 

 many branched ; leaves linear, at both ends narrowed ; stipules 

 short, binerved, entire, smooth, laxely clasping ; fascicles 

 axillary, few-flowered; flowers dioecious, octandrous and 

 trigynous, greenish, imbricate-bracteolate, cernuous 3 pedicels 

 shorter than the 5-parted glandless calyx; caryopsis sub- 

 globular-trigone, shining black, hardly rugulose. 



On shifting sandhills at the junction of the Murray and 

 Murrumbidgee, and rarely at the Mitta Mitta. 



Santalaceae. 



49. Choretrum chrysanthum. 



Branches terete ; twigs angular, not pungent ; leaves almost 

 persistent, lanceolate-subulate^ at length somewhat deltoid; 

 glomeruls yellow, 2-5-flowered, on the top of lateral very 

 short twigs ; bracteols 3 subovate or roimdish, ciliolate. 



On low scrubby ridges along the Avoca and Murray river. 



Not dissimilar to Choretrum glomeratum, from which as 

 well as the few other already known species it is easily dis- 

 tinguished by its golden flowers. 



Eriocauloneae. 

 Electrosperma. 



A new genus of Eriocauloneae. Flowers in androgynous 

 heads, all furnished with a bracteola. Eeceptacle conical. 



