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Nuytsia Vol. 7, No. 2 (1990) 
Typus: 30.5 km W of Kununoppin towards Wyalkatchem, Western Australia, 26 August 1973, 
B.R. Maslin 3405 (holo: PERTH; iso: AD, CANB, K, MEL, NSW, NY). 
Dense, rounded-triangular- or flat-crowned shrubs 0.6-1. 3 m tall, spreading 2-3 in diam. Bark 
grey, rough at stem bases, smooth on branches. Branchlels ± terete, slightly ribbed, lomentose. 
New growth white-tomentosc. Stipules persistent, subulate, 2-4 mm long, straight, chartaceous, 
pilose or pubcrulous. Phyllodes narrowly oblong-oblanccolalc, rounded-obtuse, mucronate, mucro 
short, straight or slightly curved, brown, hard, ± coarsely pungent, base attenuate, pulvinus 0.5-1 
mm long, blades 20-45 mm long, 3-10 mm wide, coriaceous, ascending to erect, straight to slightly 
incurved, lomentose, tardily glabrescent, dark green or grey-green; 1-3 main nerves on each face 
strongly salient, light-coloured, distant, the inter-nerve spaces 5 or more times wider than width of 
main nerves, occasionally a few anastomoses evident, stomata not visible, numerous secondary 
nerves less raised or all nerves about equally raised. Gland one, situated on upper margin of 
phyllode ± 2 mm above pulvinus. Peduncles (1.5-)3-4 mm long, 2 per axil, tomentose; basal 
peduncular bracts ovate, acute, scarious, c. 2 mm long, brown, glabrous except sometimes lightly 
appressed pubcrulous on abaxial surface along midnerve. Flower-heads globular, dark lemon- 
yellow, 4 mm diam., 18-20-flowered. Bracleoles linear-fusiform to narrowly oblong. Flowers 
5-merous. Sepals c. 1/2 petal length, linear, slightly expanded at apex, free. Petals free, glabrous. 
Legumes narrowly oblong, 12-25 mm long, 2.5-3 mm wide, scarcely raised over and not constricted 
between seeds, chartaceous, arcuate to irregularly flexuose (old valves coiled), pilose, light brown. 
Seeds longitudinal, oval, elliptic or oblong, 2.5-3 mm long, 1.2- 1.8 mm wide, compressed, glossy 
black; pleurogram arcuate, 0. 3-0.5 mm long; aril apical, 1/2 as long as seed, galeate, white. 
Other specimens examined. WESTERN AUSTRALIA: 16.5 km E ol Korrelocking on road to 
Kununoppin, R.S. Cowan A738 & B.R. Maslin (PERTH); N of Bungulla towards Wyalkatchem, 
B.R. Maslin 3399 (AD, BRI, CANB, G, K, MEL, NSW, PERTH); E of Korrelocking, B.R Maslin 
4453 (PERTH); W of Kununoppin towards Wyalkatchem, M.D. Tindale 100 and E.M. Bennett 
(PERTH); 3.2 km SW of Yelbini on Wyalkalchem-Kununoppin road, M.D. Tindale 3720 (AD, B, 
BRI, CANB, L, MEL, MO, NSW, PERTH, US). 
Distribution. South-west Western Australia in Avon Botanical District (1:250,000 map H50-15). 
Geographically restricted and poorly collected species of the Bungulla-Kununoppin area. 
Habitat. In mallee scrub and eucalypt woodland on hard gritty loam or clay. 
Flowering and fruiting periods. Flowers in August— September; mature legumes with seed 
collected in January. 
Affinities. Most closely allied to A. torticarpa which has partly united sepals and pubescent petals, 
sessile flower heads, spathulate bracteoles, and usually narrower, differently shaped phyllodes; the 
different shape may well be only a function of the width. Superficially, A. caesariata resembles 
A. multilineata but the tomentose branchlcts and phyllodes of the new species readily separate the 
two taxa. There is a very superficial similarity to A. consobrina but phyllodes of the latter have 
conspicuous anastomoses between the primary nerves, in addition to other differences. 
Conservation status. 2E [K], using the criteria of Briggs & Leigh (1988). 
Etymology. The specific name refers to the general "hairiness” of the plant (from caesariatus , Latin 
for covered with hair or long-haired). 
2. Acacia mimica Cowan & Maslin, sp. nov. 
Frutices 0.3-2.5 m alti, 0.6-3 m diametro extendentia, ramulis appresso-pubcrulis, 
glabrcscentibus, saepe nodosis. Phyllodia anguste elliptica usque ad oblanceolaio-oblonga vcl 
lincaria usque ad oblanceolato-linearia, acuta, obtusa vel rotundato-obtusa, plerumque mucronulata. 
