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Oreobolus pumilio R.Br.
Family Cyperaceae
Oreobolus pumilio R.Br. APNI*

Description: Small, mat-forming herbs to 10 cm high.

Leaves spirodistichous; sheaths without distinct auricles; pseudopetiole shorter than blade, slightly concave, 2–14 mm long; blade 3–25 mm long, 0.5–1.6 mm wide, densely covered adaxially with stomates between 3–6 usually obvious ribs; apex acute or obtuse.

Inflorescence with 1–3 or rarely 4 spikelets. Spikelets 4–8 (rarely to 11) mm long. Glumes usually 3 (2–4), whitish with green apex to pale brown, occasionally tinged red-brown; outermost glume 3.5–10 mm long; innermost glume 3.4–5.5 mm long. Scales straw-coloured to orange-brown. Anthers 2–3 mm long.

Nut ovoid, with truncate or obtuse apex, 1.2–1.7 mm long, 0.7–1.1 mm diam., pale red-brown.


Photo © ANBG

Herbarium
Sheet

Flowering: summer.

Distribution and occurrence: South from Brindabella Range; also in Vic and Tas; second subspecies in New Guinea.

Grows beside streams and lakes in subalpine and alpine areas.
NSW subdivisions: ST
Other Australian states: Vic. Tas.
AVH map***

Subsp. clemensiae (Kuek.) Seberg is in New Guinea; its status should be assessed.

Text by K. L. Wilson (1993); edited KL Wilson April 2017
Taxon concept:

One subsp in NSW: Oreobolus pumilio subsp pumilio

APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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