120 



of the incomplete diagnosis of that species, as published in Fl. 

 Aust., ii., p. 338. But so far it agrees with it, and differs from 

 A. rigens in those particulars pointed out by Bentham. The 

 material before me permits of a full definition of the species, 

 which here follows incorporating the new facts with Bentham's 

 diagnosis : — 



" A small tree of about 25 feet, the branches nearly terete, 

 glabrous or minutely hoary-pubescent. Phyllodia linear-subulate, 

 rigid, thick, but slightly flattened (1), 2 to 3 in, long, tapering 

 into a recurved (or straight) but not pungent point, narrowed at 

 the base, striate with numerous fine parallel nerves only visible 

 under a lens, slightly hoary-tomentose, especially along the 

 centre, without any midrib." 



Peduncles axillary, solitary, about half-an-inch long, bearing 

 each a globular head, 4*5 mm. diameter, of about 20 pale-yellow 

 4-merous flowers. 



Calyx of four sepals slightly united at the base, half as long 

 as the corolla ; each sepal narrow-oblong, slightly dilated atop, 

 cilia te (not hair-tufted as in A. rigens) on the margin of the 

 spatulous tip, thin and transparent except the yellow summit. 



Corolla of four, slightly unequal, free, incurved petals. Each 

 petal somewhat oval in outline, slightly apiculate at the summit, 

 and distinctly attenuated into a claw, with a distinct midrib ; 

 smooth, thin and transparent, but yellow in the upper half. 



Ovarium wholly concealed beneath long silky- white threads. 



" Pod flat, falcate or flexuous, 3 to 4 inches long, 4 to 5 lines 

 broad (only here and there slightly contracted between the 

 seeds), valves almost membranous (with raised reticulated nerves). 

 Seeds longitudinal (acutely ovoid, flat, brown and shining, 7x4 

 vix mm.); funicle with (two) very short folds (beneath the stroph- 

 iole), gradually and not much thickened from the base." 



Affinities and Differences. — Bentham compared his species 

 with A. rigens, with which it has much resemblance, and pointed 

 out that the finer and more numerous veins on the phyllodes, and 

 the form of the pod were specific differences. The further 

 anatomical details which I have reported above, while they indi- 

 cate on the one hand other characters in common, yet they 

 augment the difference between the two species ; notably the 

 tetramerous flowers (as noted without exception in the numerous 

 flowers analysed) and the hairy ovarium. The hairy ovarium 

 and 4-merous flowers agree with A. sessiliceps, but the sepals, 

 phyllodes, seeds, and funiculus are different. 



Localities. — The type-specimen was collected by R. Brown on 

 the " South Coast." 



In seeking to give more topographic definition of this phrase 

 we have in the first place a choice of the localities in South Aus- 



