R.S. Cowan & B.R. Maslin, Acacia Miscellany — 1 
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superficiem, nervis salienlibus, glande parva, basali. Racemorum axis 2-7 mm longus, resinosus, 
puberulus, 1-3-capitulatus, bracteis basalibus circa scmicircularibus, plus minusvc foliaccis, 1.5-2. 5 
mm longis, 1.5-2 mm latis, glabris. Pedunculi (6-) 12-20 mm longi, glabri. Capitula globularia, 
aurea, 5-6 mm diametro, 54-60-floribus, bracteolis peltalis, lamina ovala, acuminata, breviore quam 
gracili stipite. Flores 5-meri. Sepala petalis 1/2-3/4 brcviora, 3/4-connata, pubcrula. Petala 
oblanceolato-linearia, discreta, glabra. Legumen anguste oblongum, 10-22 mm longum, 3-5 mm 
latum, rectum, villosum, marginibus valde incrassatis. Semina obliqua, oblongo-ellipiica, c. 4 mm 
longa, 3 mm lata, nitido-brunnea, pleurogramma magna, conspicua, arillo subapicali. 
Typus: West side of Chester Pass Road at northern boundary of Stirling Range National Park, 
Western Australia, 15 Oct. 1974, A. S. Weston 9708 ( holo: PERTH; iso: BRI, CANB, K). 
Spreading shrubs 2.5-3 m tall, to 4 m diam. Bark longitudinally fissured at base of irunks, grey, 
red-brown on branchlets. Branchlets terete, glabrous, usually heavily resinous apically and at 
nodes. Stipules persistent, more or less foliaccous, obliquely ovate, 2-2.5 mm long, 1-1.5 mm wide, 
glabrous. Phyllodes obliquely oval to elliptic, apex obtuse to truncate and with a distinct, 
short-acuminate tip, base rounded but inequilalerally attenuate to 1-2 mm long pulvinus, blades 
15-30 mm long, 11-22 mm wide, coriaceous, patent, often becoming deflexed in drying, undulate, 
glabrous, dark green, 3 or 4 distant, longitudinal, raised, main nerves on each face, openly 
anastomosing with salient secondary nerves. Gland small, situated on upper margin just above 
pulvinus. Raceme axes 2-7 mm long, resinous, puberulous, 1-3-headcd. Peduncles (6-) 12-20 mm 
long, glabrous; basal peduncular bract encircling base of peduncle, more or less foliaceous, 1.5-2. 5 
mm long, 1.5-2 mm wide, glabrous. Flower-heads globular, golden, 5-6 mm diam., 
54-60-flowered. Bracleoles peltate, blade ovate, acuminate, shorter than slender claw. Flowers 
5-merous. Sepals 1/2-3/4 length of petals, 3/4-united, puberulous externally. Petals 
oblanceolate-1 inear, free, glabrous. Legumes narrowly oblong, 10-22 mm long, 35 mm wide, 
straight, villose, margins strongly thickened. Seeds oblique (?), oblong-elliptic, c. 4 mm long, 3 mm 
wide, glossy brown; pleurogram large, conspicuous; aril subapical. 
Distribution. South-west Western Australia in Eyre Botanical District (1:250,000 map 150-11). 
Endemic in Stirling Range National Park and apparently rare and confined to the northern boundary 
area. 
Habitat. In Wandoo woodland or along watercourses. 
Flowering and fruiting periods. Flowering October — November. A few valves with mature seeds 
collected in March and April. 
Affinities. Most closely related to A. dictyoneura but easily distinguished by the much larger 
phyllodes with cuspidate apex, the larger stipules and bracts, longer peduncles, peltate bracleoles 
and connate sepals of A. awestoniana which is apparently a very rare species and is presently 
known in nature from only a few plants. Both species are in cultivation in Tasmania. 
Conservation status. 2RC, using the criteria of Briggs & Leigh (1988). 
Etymology. The new species is named in honor of Arthur S. Weston, collector of most of the 
material known of the species and a most enthusiastic and knowledgeable field botanist in Western 
Australia. 
2. Acacia cassicula Cowan & Maslin, sp. nov. (Figure 1, D-F) 
Frutex effusus 1-2.5 m altus, 1.5-4 m diametro, cortice aspri, cinerea, ramulis pace ad sparse 
puberulis vel pilosulosis, saepe ad apicem rcsinosis. Stipulae persistentes, subulatae ad 
subulato-triangulares, ad 1 mm longae, ciliolatac. Phyllodia oblonga ad clliptica, plus minusvc 
inaequilateralia, ad apicem rotundata ad subtruncata el rctusa, mucronulaia ad rostrato-mucronulata. 
