NOTES ON ACACIA. 



499 



at the apex, glandless, one-nerved, the nerve parallel with 

 the superior margin and contiguous with it; phyllodia as 

 well as the branches hairy; heads of flowers usually twin; 

 peduncles filiform, longer than the phyllodia; phyllodia half 

 an inch long. (Don, "Gen. Hist. Dichlamydeous Plants," 

 ii, 403, 1832). 



I am further of opinion that A. dasyphylla A. Ounn., 

 which is a more pubescent form of A. lineata, comes under 

 Group 3 or 4. 



Group 5 (a glabrous form). Phyllodes glabrous except 

 a few hairs at the base, one-nerved, one thick nerve-like 

 edge, point oblique, but not pronounced, gland near base. 



Flowers in heads, on glabrous peduncles not exceeding 

 the phyllodes. Calyx narrow, irregular, hairy, free nearly 

 to the base. Petals free, glabrous, five-merous. Pistil hoary. 



[This includes A, runciformis A. Cunn., in part.] 



Specimens falling in Group 5 come from Mallee country 

 of Victoria (St. Eloy d'Alton, C. Walter); Goonoo (Mudgee 

 to Dubbo) (J. L. Boorman); also Dubbo (J. L. Boorman); 

 Gunnedah (J. L. Boorman); W. L. Waterhouse, Ticketty 

 Well, between the Gwydir and Mclntyre Rivers (E. H. F. 

 Swain); Inglewood, Queensland (J. L. Boorman). 



An affinity of A. lineata to A. aspera Lindl. is worthy of 

 . note. They are in two sub-groups in Bentham's classifica- 

 tion, viz.: — subseries Armatse and Brevifoliae respectively 

 of the Uninerves, but the latter species may have phyllodes 

 so small, and of such a shape that they may readily be con- 

 fused with the latter. 



f. Acacia imbricata F.v.M. 



I have examined a specimen of the type (in fruit) from 

 Tumby Bay, Spencer's Gulf, S.A., through the kindness of 

 Professor Ewart, and have a flowering specimen (cultivated) 

 from another source. 



