Common name: bastard mulga
Acacia sibirica S.Moore APNI*
Synonyms: Acacia stowardii Maiden APNI*
Acacia clivicola Pedley APNI*
Racosperma stowardii (Maiden) Pedley APNI*
Racosperma sibiricum (S.Moore) Pedley APNI*
Description: Erect or spreading shrub or tree 2–5 m high; bark finely fissured, grey; branchlets angled or terete, ± scurfy.
Phyllodes ± linear, ± curved, 4–8 cm long (often with some phyllodes shorter), 1–3 mm wide, glabrous, ± resinous, longitudinal veins numerous, fine, obscure, apex subacute with a mucro; 1 small gland near base; pulvinus < 2 mm long.
Inflorescences 2 or rarely 1 in axil of phyllodes; peduncles 3–5 mm long, glabrous; heads ± ovoid or short-cylindrical, mostly 0.5–1.5 cm long, 25–35-flowered, bright yellow.
Pods straight to slightly curved, ± flat but convex over seeds alternately on each side, straight-sided to slightly constricted between seeds, 2.5–7 cm long, mostly 4–7 mm wide, firmly papery, ± finely reticulate, ± glabrous; seeds oblique or longitudinal; funicle expanded towards seed.
Flowering: throughout year, irregularly depending on weather conditions.
Distribution and occurrence: north and west from the Bourke district.
Scattered in Mulga and heath.
NSW subdivisions: NWP, NFWP
Other Australian states: Qld W.A. S.A. N.T.
Named after the Type locality Siberia Soak, c. 75 km NW of Kalgoolie, WA. Described under the synonym Acacia stowardii in the Flora of New South Wales Vol. 2 (2002), and has previously been considered incorrectly as a synonym of A. kempeana (Flora of Australia 11B, 2001).
Text by P.G. Kodela (February 2006)
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