113 
No. 169. 
Acacia adunca, A. Cunn. 
A Wattle. 
(Family LEGUMINOSyE : MIMOSEyE.) 
I must make some preliminary remarks (before dealing with A. adunca itself) 
concerning A. crassiuscula, Wendi., which has been confused with A. adunca, and 
indeed with other Acacias. 
In Wendland’s Commentatio de Acaciis aphyllis* Hanover, 1820, Acacia 
crassiuscula is figured, and described in the following words :— 
A. inermis : capitulis subracemosis paucissimis : petiolis lira ari spathulatis, apice rotundatis, 
mucronatis crassiusculis, calyce quinquefido : genuine glabro. Habitat in Nova Hollandia. 
Frutex glaber, tripedalis, cortice fusco : ramis erectis vel patentibus, angulatis, angulis obtusis 
marginatis. 
Petioli alterni vel suboppositi, remotiusculi, coriaceo-crassiusculi, erecto-patentes, exacte lineari- 
spathulati subfalcati apice rotundati, breviter mucronati : uninervii, venosi, marginati margine antico 
ad basin feie, uniglanduloso bi-tripollicares et longiores, 1-2 lineas lati. Stipuhe nullae. 
Flores capitati, lutei, bracteolis spathulatis, concavis apice acutis, subpubcscentibus interstincti. 
Capitula multiflora, pauca 3-5 in racemos axillares solitarios breves collecta, mediae magnitudinis, 
insidentia pedicellis piulo longioribus, subclavatis, sicut pedunculus communis, basi bractea ovata, acuta, 
minima suffultis: 
Calyx membranaceus diaphanus, monophyllus, turbinatus, quinquefidus: laciniis linearibus, 
superne valde dilitatis, acutiusculis, apise fusas. 
Corolla monopetala quinquefida : laciniis erectis, oblongis, obtusis, calyce duplo longioribus. 
Stamina numerosa, corolla longiora. 
Germen oblongum, glabrum. Stylus staminibus paulo longior germinis apici insertus. 
Legumen .(v.v.).” 
The species has since been shown, and I think correctly, to be a Western 
Australian species, and to be synonymous with A. pycvophylla, Benth., which must 
fall. 
Then we have:— 
“A. crassiuscula (Wendi. Diss., n. 20, t. 8) phyllodiis linearibus 1-nerviis crasiusculis integerrimis 
basi attenuatis apice rotundatis inflexo-mucronatis, capitulis subternis racemosis, Horibus 5-fidis. Hab. in 
Nov. Hull, ora orienlali. Sieb. l.c., n. 464 (v.s.).” (DC. Prod. 2 (1825) 453.) 
Acacia crassiuscula (Wendi. Diss., no. 20, t. 8) phyllodia linear, 1-nerved, thiekish, (juite entire, 
attenuated at the base, rounded at the apex, and ending in an indexed mucrone ; heads of flowers usually 
3 in a raceme; flowers 5-cleft. Native of New Holland, on the east coast. Sieb. pi. exsic. nov. Itoll. 
No. 464. 
Thiekish- leaved Acacia. FI. April, .June. Clt. 1824. Shrub 4 to 6 feet. 
(Don’s General History oj the Dichlamydeous Plants, vol. ii, p. 406 (1832).) 
• In Don’s Gen. Hist. Dichlamyd. Plants, the reference is given as Wendi. Diss. Mo. 20. t. 8, and he is followed in 
Heutham LotuI. Journ. Bot., i, 356. I cannot trace Wendland’s Disserlationes, and suggest that the work is really the 
same as the Hanoverian one. Bentham (15.FI. ii, 372) quotes Commentatio. 
