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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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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.