S3

slightly minutely hairy, nerves numerous, obscure, closely spaced, parallel, gland small.

Inflorescences: Simple, axillary spikes, 1-2 per axil, spikes 1-3 cm long, flowers subdensely arranged along rachis, pale yellow; flowers 5-merous, sepals partially fused. Flowering is irregular, usually after rain.

Fruits: Pods, narrowly oblong to linear, 4-16 X 0.6-0.7 cm, subwoody, with reticulate longitudinal nerves. Seeds longitudinal to obliquely aligned in pod, more or less elliptic, the seed coat forms a narrow flange that encircles the edge of the seed, funicle thin, aril obscure. Mature pods have been collected during Sept.-Oct.

Wood: Heartwood dark brown, very hard, properties poorly known, density probably around 1200 kg m-3; reported to be excellent firewood.

Climate: Altitudinal range: 50-500 m; Hottest/coldest months: 39-40°C/6-9°C; Frost incidence: low to moderate; Rainfall: 150-290 mm per year, sporadic but slight summer max.

Distinctive features: Usually a tree growing along seasonally dry watercourses, with mainly smooth, orange-brown to reddish brown bark, covered in short, narrow shavings, which curl back to form a 'hairy' appearance; mature phyllodes narrow, terete or flat with numerous, obscure, parallel, closely spaced nerves, apex pungent; flower spikes 1-2 per axil; pods long, 0.6-0.7 cm wide, seed coat forms a narrow wing that encircles the edge of the seed.

Acacia cyperophylla 1. Stand, near Mt Augustus, W.A. 2. Bark 3. Mature pods 4. Seeds 5. Adult phyllodes 6. Maturing pods 7. Tree, Simpson Desert, S.A. 8. Inflorescences and maturing phyllodes 9. Phyllode nervation

Was this article helpful?

0 0

Post a comment