173 



L. fasciculate m , Thell. Gladstone; Yunta ; Renmark ; 

 also Broken Hill, New South Wales. Fruits densely clus- 

 tered at the ends of the branches. Both these species were 

 placed by Bentham in the Fl. Aust. under L. ruderale, L., 

 a European and Asiatic species which Dr. Thellung, in his 

 monograph of the genus, considers does not exist in Aus- 

 tralia. The determinations were made by Mr. J. H. Maiden. 



Stenopetalum sphaerocarpum, F. v. M. Cultivated 

 specimens show that the white petals are, when the circinnate 

 blade is unrolled, quite twice as long as the sepals (4 mm. 

 as against 2 mm.). 



S. linear e, R. Br^ Mundowdna (Dist. C). 



Blennodia canescens, R. Br., var. pterosperma, J. M. 

 Black. Parachilna. 



Alyssum linifolium, Steph. Marree (Dist. C). 



Menkea sphaerocarpa, F. v. M. Waterhole near Marree. 

 Already recorded from Arkaringa. 



*Diplotaxis tenuifolia, DC. Common and growing 

 luxuriantly over 1 m. high in the sandy bed of the Yunta 

 Creek, near the railway. This weed is said to have been 

 introduced here from Port Lincoln some years ago under the 

 mistaken impression that it was a useful fodder plant. 



Leguminosae. 



Acacia colletioides, A. Cunn. Dublin scrub (Dist. A); 

 Yunta (border of Dists. S. and M). 



A. hakeoides, A. Cunn. Dublin (Dist. A; H. Griffith); 

 Halbury, Peterborough (Dist. N) ; Oodnadatta (Dist. C). 



A. Oswaldii, F. v. M. Yunta (border of Dists. S 

 and M). 



A. Kempeana, F. v. M. Ooldea (Dist. W; S. A. 

 White). Flowering December, 1917. 



A. oxycedrus, Sieb. Between Mount Gambier and 

 Glencoe (E. H. Alcock). Flowering at end of August, 1917. 

 Calyx flat-based and saucer-shaped, hairy, ^ mm. long; petals 

 free nearly to base, smooth and glabrous, 1^ mm. long. 



A. brachystachya, Benth. Ooldea (S. A. White). 



Acacia rivalis, nov. sp. (tab. xviii.J. Frutex glab- 

 rescens 8-lf. m. alius in alveo rivi torridi crescens, ramulis 

 angulatis, phyllodiis lineari-lanceolatis plus minus falcatis 

 I/.-7 cm. longis circiter 3 mm. latis obscure uninerviis et 

 penninerviis oblique mucronulatis, glanduld marginali pusilld 

 paulo infra medium phyllodii sitd, pedunculis monocephalis 

 solitariis pubescentibus lf-6 mm. longis, capitulis parvis 

 globosis circiter ^0-floris, floribus pentameris, calycis mem- 

 branacei lobis brevibus obtusis pilosis, petalis distinctis 

 uninerviis superne pilosis calyce fere semel longioribus. 



