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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not reflected in Florabase, herbarium collections, or in the census. We are hoping to be able to reinstate services around December 15; we will provide an update at that time.

The notice period started at 9:00 am on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Monday, 15 December 2025 +08:00.

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Lolium perenne L.
Perennial Ryegrass

Reference
Sp.Pl. [Linnaeus] 1:83 (1753)
Conservation Code
Not threatened
Naturalised Status
Alien to Western Australia
Name Status
Current

Short-lived, tufted biennial or perennial, grass-like or herb, 0.08-0.9 m high. Fl. green, Sep to Dec. Grey or black peaty sand, sandy clay, laterite. Granite outcrops, swamps, roadsides.

Grazyna Paczkowska, Descriptive Catalogue, 24 November 1993
Image

Distribution

IBRA Regions
Avon Wheatbelt, Dampierland, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain, Warren.
IBRA Subregions
Fitzgerald, Geraldton Hills, Katanning, Merredin, Northern Jarrah Forest, Perth, Pindanland, Recherche, Southern Jarrah Forest, Warren, Western Mallee.
IMCRA Regions
Abrolhos Islands, Leeuwin-Naturaliste.
Local Government Areas (LGAs)
Bayswater, Beverley, Broome, Bunbury, Busselton, Capel, Chittering, Cockburn, Collie, Cranbrook, Denmark, Dumbleyung, Esperance, Gingin, Gnowangerup, Greater Geraldton, Harvey, Kondinin, Kulin, Mandurah, Manjimup, Mundaring, Nannup, Narembeen, Nedlands, Northampton, Perth, Plantagenet, Quairading, Rockingham, Serpentine-Jarrahdale, Wanneroo, Waroona, West Arthur, Woodanilling.