Acacia synoria Maslin (ms)
Obconic shrubs 2–4 m tall, maturing to trees 5 m tall. Branchlets glabrous. Phyllodes terete, acuminate-caudate with delicate, slightly curved, innocuous to somewhat pungent, brown points, (5–) 6–9 (–10.5) cm long, 0.7–1 mm wide, slender, not especially rigid, erect, mostly shallowly incurved, glabrous (except pulvinus hairy on the upper surface), light green; longitudinal nerves 8, each separated by a distinct, longitudinal groove. Inflorescences simple, 1 or 2 per axil; heads sub-globular to obloid, light golden, 20–30-flowered; young buds resinous; peduncles 2–5 (–6) mm long, glabrous. Flowers 5-merous; sepals free. Pods terete, 5–9 (–10) cm long, 1–2 mm wide, straight to shallowly curved, thinly coriaceous-crustaceous, glabrous, finely longitudinally nerved. Seeds oblong to elliptic, 2.5–3 mm long, 1–1.5 mm wide, shiny, light brown with obscure yellowish mottlings; aril terminal, almost as long as the seed, lemon yellow.
A relatively uncommon species known from only a few localities NE of Kalannie, W.A. Probably confined to granite rocks. Flowering Oct. – Dec.
This species does not appear to have any particularly close relatives. Its long, 8-nerved phyllodes (which are deeply grooved between the nerves) are similar to those found in A. aulacophylla and A. sessilispica .
W.A.: Carlyarn Rock, corner of Glamoff and Black Roads, c. 45 km due NE of Kalannie, B.R.Maslin 7860 (PERTH); 18 km SE of Mt Gibson, R.J.Cranfield 8558 (PERTH).
This species was not included in the Fl. Australia treatment of Acacia . The above account is based on the treatment presented in: Maslin, B.R. (1998), Wattle of the Kalannie region: their identification, characteristics and utilisation. CDROM Publication. (Department of Conservation and Land Management: Perth.)