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Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s flora taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not currently being reflected in Florabase, herbarium collections, or the census. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

The notice period started at 9:45 am on Friday, 12 December 2025 +08:00 and will end at 12:00 pm on Monday, 2 March 2026 +08:00.

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Paspalidium constrictum (Domin) C.E.Hubb.
Knottybutt Grass

Reference
Bull.Misc.Inform.Kew 447 (1934)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Often rhizomatous, tufted perennial, grass-like or herb, 0.2-0.6 m high. Fl. green/purple, mostly Apr to Aug. Red sand, red or dark brown loam, clay.

Grazyna Paczkowska, Descriptive Catalogue, 1 December 1993

Distribution

IBRA Regions
Avon Wheatbelt, Central Ranges, Coolgardie, Gascoyne, Geraldton Sandplains, Great Victoria Desert, Jarrah Forest, Mallee, Murchison, Nullarbor, Pilbara, Yalgoo.
IBRA Subregions
Augustus, Carlisle, Carnegie, Central, Chichester, Eastern Goldfield, Eastern Mallee, Eastern Murchison, Edel, Fortescue, Geraldton Hills, Hamersley, Katanning, Mann-Musgrave Block, Merredin, Northern Jarrah Forest, Nullarbor Plain, Roebourne, Shield.
Local Government Areas (LGAs)
Ashburton, Coolgardie, Coorow, Cunderdin, Dundas, East Pilbara, Esperance, Greater Geraldton, Kalgoorlie-Boulder, Karratha, Laverton, Leonora, Meekatharra, Menzies, Moora, Ngaanyatjarraku, Northam, Nungarin, Port Hedland, Shark Bay, Swan, Victoria Plains, Wiluna, York.