R.S. Cowan & B.R. Maslin, Acacia Miscellany — 2 
203 
1. Acacia adenogonia (Pedley) Cowan & Maslin, comb. nov. (Figure 1, 0-S) 
Basionym: Racosperma adenogonium Pedley, Austrobaileya 2(4): 316 (1987), based on the 
following. 
A. deltoidea Cunn. ex Don var.? pungens Bcnth., London J. Bot. 1: 333 (1842). Type: Greville 
Island, Western Australia, A. Cunningham s.n. (holo: K; iso: BM (probably), PERTH — fragment 
ex K). 
Illustration. L. Pedley, loc. cit., p. 317, Figure 1, E-I (1987). 
Erect to sprawling shrubs 1-2 m tall, spreading to 3 m. Bark smooth, dark red-brown with many 
pale lenticels. Branchlets terete, canescent-villose, scattered shorter gland-tipped hairs sometimes 
intermixed. Stipules persistent, subulate, 2.5-6.5 mm long, united to 1/3 length, curving upwardly, 
rigid, ciliolate, small subulate lobes sometimes present between primary ones. Phyllodes 
inequilaterally ovate to lanceolate, acuminate-pungent, sessile to subsessile, (3-)5-10(-15) mm long, 
1.54.5 mm wide, coriaceous, crowded-imbricate, patent to inclined, subglabrous to villose, 
Figure 1. Some variation in phyllodes of taxa comprising the A. deltoidea alliance. A-B - A. stipulosa; C-D - A.froggattii; 
E-G - A. sublanala; H-M - A. deltoidea subsp. deltoidea; N - A. deltoidea subsp. ampla; O-P - Gibb River form of 
A. adenogonia; Q-S - coastal, typical form of A. adenogonia; T - A. vincentii. Phyllodes in most cases from 
several collections to illustrate intra- and inter-taxon variation in size and form; phyllode of A. vincentii from the 
type. All drawn at about 2x 
