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Bromus diandrus Roth
Family Poaceae
Common name: Great Brome

Bromus diandrus Roth APNI*

Synonyms: Bromus gussonii Parl. APNI*

Description: Tufted, often robust annual to 1 m high; culms usually stout, ascending, geniculate.

Leaves with sheath loose, villous to puberulent; ligule obtuse to laciniate, 1–5 mm long; blade to 10 mm wide, villous to puberulent.

Panicle open, loose, to 26 cm long, branches nodding. Spikelets 5–14-flowered, 5–10 cm long including awns. Glumes acute, lower linear-lanceolate, 12–24 mm long, 1–3-nerved; upper lanceolate, 20–30 mm long, 3–5-nerved. Lemmas 20–32 mm long, lanceolate, with a toothed apex 5–7 mm above the insertion of the awn, 5–7-nerved, keeled; awn 3.5–6 cm long. Palea c. 60% length of the lemma.

Photo D. Hardin

Photo D. Hardin

Flowering: spring.

Distribution and occurrence: Grows in grassland or woodland, usually disturbed areas, and often in damp areas and by creeks; widespread. Native of Medit. region.
NSW subdivisions: *NC, *CC, *SC, *NT, *CT, *ST, *NWS, *CWS, *SWS, *NWP, *SWP, *NFWP, *SFWP, *LHI
Other Australian states: *Qld *Vic. *Tas. *W.A. *S.A. *N.T.
AVH map***

This species has been confused with the similar but distinct B. rigidus that grows in S.A. & Vic. and could be recorded from N.S.W.

Text by S. W. L. Jacobs & S. M. Hastings
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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