R.S. Cowan & B.R. Maslin, Acacia Miscellany — 2 
205 
2. Acacia deltoidea Cunn. ex Don, Gen. Hist. 2: 401 (1832). 
Type : Montague Sound, Western Australia, 1820, A. Cunningham 293 (lecto: BM, fide L. Pedley, 
Austrobaileya 2(4): 315 (1987); iso: K, US). 
Racosperma deltoideum (Cunn. ex Don) Pedley, Austrobaileya 2(4): 315 (1987). 
Illustrations. F. Mueller, Iconogr. Austral. Acacia, dec. 7, pi. [1] (1887), as A. stipulosa ; 
J.H. Maiden, J. & Proc. Roy. Soc. New South Wales 53, pi. 13, figs. 7-17 (1920); L. Pedley, loc. 
cit., p. 319, Figure 2, J-N (1987). 
Shrubs 1.5-3 m tall. Bark grey to dark brown, fissured. Branchlets glandular puberulous with 
intermixed longer hairs, sometimes ± resinous. Stipules persistent, subulate, partly united, 1 .5-4 
mm long, upwardly curving, ciliolate or glandular ciliolate. Phyllodes subsessile, inequilaterally 
cuneate, elliptic, ovate or broadly obdeltate, with a gland-bearing angle on die upper margin, ± 
mucronate-pungent, 6-16 mm long, 4-7 mm wide, thinly coriaceous to coriaceous, congested, 
imbricate, patent to ascending, glabrous or ± glandular puberulous on faces, and generally on 
margins, bright green; 3 or 4 longitudinal main nerves on each phyllodc face inconspicuous to 
prominulous; gland 1, situated on upper margin of phyllode, rarely projecting beyond margin. 
Peduncles (6-)10-25 mm long, solitary, glandular puberulous, basally ebracteate, rarely with a 
median peduncular bract; heads globular, dark golden, 5-6 mm diam., (30-)56-73-flowered, 
compact; bracteoles ± exserted in bud, spathulate with blade lanceolate and long-acuminate. 
Flowers 5-merous. Sepals 1/2-2/3 corolla length, 1/3-1/2-united, lobes linear, glandular-puberulous 
apically. Petals 2/3-3/4-united, lobes ovate. Stamens free. Legumes oblong, slightly raised over 
but not constricted between seeds, 28-42 mm long, 9-12 mm wide, thinly coriaceous, straight, 
obliquely reticulate-ncrvcd, base rounded, apex roslriform. Seeds obliquely oriented, 5 mm long, 
2.5 mm wide, compressed, dull dark-brown; pleurogram closed; aril apical. 
2a. Acacia deltoidea Cunn. ex Don subsp. deltoidea. (Figure 1 , H-M). 
Phyllodes coriaceous, inequilaterally cuneate, elliptic or triangular, excentrically 
mucronate-pungent, 6-8.5 mm long, 4-6 mm wide, glandular-puberulous, often obscurely. 
Peduncles 10-12 mm long, glandular-puberulous, rarely with a bract about the middle; bracteoles ± 
exserted in bud. 
Other specimens examined. WESTERN AUSTRALIA; 3.7 km NW of Mt Daglish, J.J. Alford 558 
(PERTH); near Manning Gorge, Ml Barnett Station, /. Cowie 330 (PERTH); Fitzroy River, 1879, 
A. Forrest s.n. (NSW, PERTH 00698172); creek entering inlet of Talbot Bay, 23 km SE of 
Cockatoo Island, P.A. Fryxell & L.A. Craven 3893 (CANB, PERTH); Plain Creek, c. 10 km W of 
Beverley Springs Homestead, A.S. George 12228 (PERTH); Manning Gorge, A.S. George 15176 
(PERTH); above the headwaters of the Helby River, T.G. Hartley 14819 (PERTH); Prince Regent 
River Reserve, K.F. Kenneally 2081 (K, MEL, PERTH); Euro Gorge, Drysdale River National 
Park, K.F. Kenneally 4363 (BRI, PERTH, TLF); Steep Island off Raft Point at entrance to Doubtful 
Bay, K.F. Kenneally 9681 (BRI, K, PERTH); 5.7 km NW of Gibb Rivcr-Kalumburu Road 
intersection, travelling along old Mitchell River Station Road, B.L. Koch 568 (CANB, K, PERTH); 
Boomerang Bay, Bigge Island, N.G. Marchani 72/116 (PERTH); High Cliffy Islands, E of 
Montgomery Island, 24 May 1987, L.M. Marsh s. n. (PERTH 00870021); Galvans Gorge, 14.8 km 
5 of Barnett River on Gibb River - Derby road, J.G. & M.H. Simmons 1901 (PERTH); Stewart 
River valley, c. 82 km NNE of Derby, 13 km NNW of "Kimbollon" Homestead, I.R. Telford 6310 
6 G. Butler (PERTH). 
Distribution. Northern Western Australia through most of the Gardner Botanical District and 
adjoining north-west part of the Fitzgerald Botanical District (1:250,000 maps D51-12, 15, 16; 
D52-10, 13; and E51-3, 4, 8). Occurs in scattered populations in the Kimberley in Buccaneer and 
Bonaparte Archipelago areas and near Cambridge Gulf extending inland to Mt Barnett and 
Drysdale River National Park. The A. Forrest collection cited above extends the range southward; 
