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Nassella megapotamia (Spreng. ex Trin.) Barkworth
Family Poaceae
Nassella megapotamia (Spreng. ex Trin.) Barkworth APNI*

Synonyms: Stipa megapotamia Spreng. ex Trin. APNI*

Description: Caespitose perennial to 1.3 m high.

Leaves with ligule truncate, membranous, glabrous, to 0.7 mm long; auricles ± thickened, with a tuft of hairs at the base; blade expanded or loosely rolled, 3.5–4 mm wide, strongly to slightly ribbed, glabrous, margins ciliate.

Panicle exserted, contracted, 25–35 cm long. Spikelets 8–10 mm long (excluding awns). Glumes subequal, 3-nerved, lower 8–10 mm long, upper 9–9.5 mm long. Lemma 5.5–6 mm long, scabrous with crystalline tubercules; lobes 0.1–0.2 mm long; corona 0.5–0.8 mm long with spines on the upper margin. Callus 2–2.5 mm long, weakly bent at the tip, densely silky. Awn with 2 or 3 bends, c. 50 mm long. Palea 20–25% the length of the lemma.

Flowering: summer.

Distribution and occurrence: Only known from the Canberra region, apparently an escape from plant introduction plots. Native of S Amer.
NSW subdivisions: *ST
AVH map***

Text by S. W. L. Jacobs & J. Everett
Taxon concept: Flora of NSW 4 (1993)

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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