150 R. H. CAMBAGE. 



Nos. 8, 9 and 10. Phyllodes, having a prominent nerve 

 below the central portion of the lamina, and a fine nerve 

 extending along the upper part. These veins are confluent 

 at the base, but not at the apex, the upper or fine vein not 

 extending quite to the apex of the phyllode. When the 

 trees reach maturity this fine vein is not seen though it is 

 very distinct in seedlings, and Bentham describes the 

 phyllode of this species as "1-nerved." 1 This feature is 

 suggestive of the possibility that the ancestor of this species 

 was bi-nerved, from which a 1-nerved form has been 

 developed. See also description of Acacia binervata,(infra). 



Uninerves — Racemosse. 



Acacia palcata, Willd. Seeds from Homebush. Growing 

 on Wianamatta Shale formation. (Plate II, Numbers 

 1 to 2a.) 



Seeds black, oval, 4 to 4*5 mm. long, 2*5 to 3 mm. broad, 

 1*2 mm. thick. 



Hypocotyl erect, terete, reddish-brown, 1 to 3*2 cm. 

 long, 1 to 1*4 mm. thick at base, *4 to *8 mm. at apex, 

 glabrous. 



Cotyledons sessile, slightly sagittate, oblong, apex 

 rounded, 6 mm. long, 3 mm. broad, soon becoming revolute 

 and cylindrical, falling off in a few weeks; outer or under- 

 side brownish, becoming green, upperside green, glabrous. 



Stem terete, greenish-brown, glabrous. First internode 

 *5 mm.; second 2 to 5 mm.; third 3 to 8 mm.; fourth 4 mm. 

 to 1*5 cm.; fifth 5 mm. to 2*7 cm. 



Leaves — No. 1. Abruptly pinnate, petiole 4 to 5 mm. long, 

 reddish-green, glabrous; leaflets three to four pairs, oblong- 

 lanceolate, acuminate, 6 to 9 mm. long, 2 to 2*5 mm. broad, 

 midrib distinct, upperside green, glabrous, underside pale 

 green; rachis 5 mm. to 1 cm. long, green, glabrous, excur- 

 rent. 



1 B. Fl., Vol. ii, p. 359. 



