218 
NuylsiaVol. 7, No. 2(1990) 
Other specimens examined. WESTERN AUSTRALIA: N of Yorkrakine, C.A. Gardner 7621 
(PERTH); E of South Kumminin, C.A. Gardner 9485 (PERTH). 
Distribution. Soulh-west Western Australia in Avon Botanical District (1:250,000 maps H50-15; 
150-3). Only three collections arc known of this species, all from near Yorkrakine and South 
Kumminin. Numerous attempts to re-collect the species in any of the localities have been in vain. 
Habitat. No details available. 
Flowering and fruiting periods. Flowers collected in July; legumes with mature seeds collected in 
September. 
Affinities. The new species is part of the ’A. multilineata group’ and is most similar to A caesariata , 
differing in having sessile flower heads with a subtending row of bract-like bracteoles, partly 
connate perianth parts, sulcate branchlets and flexuose legumes. 
Conservation status. 3E[K], using the criteria of Briggs & Leigh (1988). 
Etymology. C.A. Gardner coined the specific epithet in allusion to the strongly flexuose fruits, but 
never published it. We have adopted his herbarium name, rather than another, to avoid any possible 
confusion with duplicates the collector may have distributed bearing this name. 
6. Acacia unguicula Cowan & Maslin, sp. nov. (Figure 1) 
Frutices 1-2 m alti vel arbores usque ad 3 m altae, cortice cinereo, fibroso cl truncorum versus 
basem plus minusve Fissurato, ramulis angularibus, glabris appresso-puberulis in phyllodiorum 
axillas exceptis. Stipulae persistentes, spinescemes, recurvatae, 0.7- 1.2 mm longac. Phyllodia 
anguste oblonga ad oblongo-oblanceolata vel clliptica, abrupte el breve angusto-cuspidata, attenuata 
versus basem, (14-)20-40 mm longa, 3-4 mm lata, rigida, recta vel levilcr curvata, glabra, 14-16 
nervis principalibus valdissime salientibus; glande 1 vel 2. Fedunculi 7-1 1 mm longi, binati, glabri; 
pedunculi bractea basalis cucullata, rostrata. Capilulae globulares, aLro-aureae, 5-6 mm diametro, 
24-34-floribus; bracteolis linearibus vel lineari-spathulatis. Flores 5-mcri. Sepala petala minus 
quam 1/2 breviora, discreta, linearia ad lineari-spalhulata. Petala discreta, glabra. Legumen 
lineare, ad 60 mm longum, 2 mm latum, parce appresso-pubcrulum. Semina non vidi. 
Typus: Mount Singleton, Ninghan Station, Western Australia, 6 August 1969, R.A. Saffrey 829 
(holo: PERTH; iso: CANB, K, MEL, NY). 
Openly branched shrubs 1-2 m or tree (?) to 3 m tall. Bark grey, fibrous and somewhat fissured 
at base of trunks, smooth on branches. New shoots sparsely appressed puberulous, hairs white, 
shoots arising from within axil of paired peduncles at anthesis. Branchlets with several low ridges, 
glabrous except appressed puberulous in axils of phyllodcs. Stipules persistent, spinescent, more or 
less recurved, 0.7-1. 2 mm long. Phyllodes narrowly oblong to oblong-oblanceolate or elliptic, 
abruptly and often cxcentrically short-cuspidate, pungent, (14-)20-40 mm long, 3-4 mm wide, rigid, 
erect, straight or slightly curved, glabrous except appressed puberulous basally on adaxial surface, 
olive-green; 14-16 main nerves strongly salient, few strong anastomoses evident, stomata distinct, 
not strongly raised. Glands 1 or 2 on upper margin of phyllode, lowest one in basal hall ol 
phyllode, upper one (when present) near apex. Peduncles 7-1 1 mm long, 2 per axil, glabrous; basal 
peduncular bract caducous, cucullate, rostrate. Flower-heads globular, deep golden, 5-6 mm diam., 
24-34-flowered. Bracteoles linear or linear-spalhulate. Flowers 5-merous. Sepals less than 1/2 
petal length, free, linear-spathulate. Petals free, glabrous. Legumes (immature) linear, to 60 mm 
long, 2 mm wide, slightly raised over and scarcely constricted between seeds, old valves coiled, 
sparsely appressed puberulous. Seeds not seen. 
