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Pentameris airoides Nees
False Hairgrass

Sem.Hort.Bot.Vratisl. (1834)
Conservation Code
Not threatened
Naturalised Status
Alien to Western Australia
Name Status


IBRA Regions
Avon Wheatbelt, Carnarvon, Coolgardie, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Murchison, Swan Coastal Plain, Yalgoo.
IBRA Subregions
Eastern Goldfield, Eastern Mallee, Eastern Murchison, Fitzgerald, Geraldton Hills, Katanning, Lesueur Sandplain, Mardabilla, Merredin, Northern Jarrah Forest, Perth, Recherche, Southern Cross, Southern Jarrah Forest, Tallering, Western Mallee, Western Murchison, Wooramel.
IMCRA Regions
Central West Coast.
Local Government Areas (LGAs)
Armadale, Beverley, Boyup Brook, Bruce Rock, Busselton, Carnamah, Chapman Valley, Collie, Coolgardie, Coorow, Corrigin, Cranbrook, Cue, Cunderdin, Dalwallinu, Dandaragan, Dowerin, Dundas, Esperance, Gingin, Gnowangerup, Goomalling, Gosnells, Greater Geraldton, Joondalup, Kalamunda, Kellerberrin, Kent, Kondinin, Koorda, Kulin, Lake Grace, Menzies, Merredin, Moora, Morawa, Mount Marshall, Mukinbudin, Murchison, Narembeen, Narrogin, Northam, Northampton, Perenjori, Pingelly, Quairading, Ravensthorpe, Sandstone, Serpentine-Jarrahdale, Shark Bay, Swan, Tammin, Toodyay, Trayning, Victoria Plains, Westonia, Wickepin, Wongan-Ballidu, Wyalkatchem, Yalgoo, Yilgarn, York.

Management Notes (for the Swan NRM Region)

Alternative Names. Annual Pentaschistis.

General Biology. Growth form. Grass. Life form. Annual, caespitose. Reproduction. Seed. Dispersal. Wind. Photosynthetic Pathway. C3.

Notes. Adapted to temperate, mesic climates in open habitats.

Additional information. Origin. South Africa. History of use/introduction. Pasture in rangelands, soil stabilisation.

Suggested method of management and control. Prevent seed set. Try low rates of glyphosate otherwise grass-slective herbicide when actively growing. Read the manufacturers' labels and material safety data sheets before using herbicides. For further information consult the Australian Pesticides and Veterinary Medicines Authority to determine the status of permits for your situation or state.

Management Calendar

Calendar Type Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Comments
Active Growth           Y Y Y Y Y      
Germination         O Y Y            
Flowering               O Y Y O    
Fruiting                   Y Y    
Optimum Treatment             U U U        

Legend: Y = Yes, regularly, O = Occasionally, U = Uncertain, referred by others but not confirmed.



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  • Brown, K. & Brooks, K. (2002) Bushland Weeds: A Practical Guide to their Management. Environmental Weeds Action Network, Greenwood.
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  • Hester, A.J. & Hobbs, R.J. (1992) Influence of fire and soil nutrients on native and non-native annuals at remnant vegetation edges in the Western Australian wheatbelt. Journal of Vegetation Science, 13 (1): 101-108.
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