8 
No. 149. 
Acacia implexa, Benth. 
A Hickory. 
(Family LEGUMINOS^E : MIMOSE^.) 
Botanical description.—Genus, Acacia. (See Part XV, p. 103.) 
Botanical description. —Species, A. implexa, Bentli., in Hooker’s London 
Journal of B tany, Yol. ], p. 368 [1842.] 
156. A. implexa (sp. n.), glabra subglauca, ramulis subteretibus, phyllodiis elongato falcatis obtusi- 
usculis basi longe angustatis subcoriaceis tenuiter multinerviis et venulosis, racemis oligocephalis laxis 
subramosis, capitulis dense multifloris, calyce corolla subtriplo breviore, legumine longe et anguste lineari 
arcuato contorto marginato glauco-pruinoso. Phyllodia semipedalia iis A. heferovhyllae potius quara 
A. melanoxyi similia. Capitula parva. Legumina semipede longiora, vix 2 lin. lata, post semina delapsa 
valde contorta et implexa.—Ravines of Shoalhaven River, E. Coast, Cunningham. 
It was redescribed by Bentham in the following words:— 
A glabrous tree, sometimes slightly glaucous ; branchlets terete or nearly so. 
Phyllodia lanceolate-falcate, more acuminate, more narrowed at the base and thinner than in 
A melanoxylon, mostly 5 or 6 inches long or more, with several slender longitudinal nerves 
and fine veins. 
Peduncles few, in a very short raceme, more slender than in A. melanoxylon, bearing each a small 
dense head of numerous flowers, mostly 5-merous. 
Calyx scarcely half as long as the corolla, turbinate. 
Petals smooth, united to the middle. 
Pod narrow-linear, much curved and twisted, 2 or rarely nearly 3 lines broad, contracted between 
the seeds. 
Seeds ovate-oblong, longitudinal ; funicle dilated and coloured almost from the base, much folded 
under the seed, but not encircling it. (B.F1. ii, 389.) 
Differences between this tree and the Blackwood. 
The closest affinity of this tree is with Acacia melanoxylon , the Blackwood. 
See Plate 57, Part XV, Yol. 2, of this work. 
The pod of A. melanoxylon is sometimes broader, but by no means always. 
The pod of A. implexa is more twisted, sometimes very twisted. The funicle 
encircling the seed is a double fold in A. melanoxylon, while in A. implexa the 
funicle is folded under the seed. This character is of great importance. 
The phyllodia of A. implexa are more acuminate, and more narrowed at the 
base than in A. melanoxylon. (See plate.) They are mostly 5 or 6 inches long or 
more in A. implexa. 
