Yellow Ixia

Yellow Ixia.

Common name

Yellow Ixia

Scientific Name

Ixia maculata 

Type of plant

Bulbs or Corms

About this weed

Yellow Ixia is another South African perennial herb that has escaped from gardens.  Like the gladiolus, Ixias reproduce by corms and seeds, but unlike the gladiolus seed which is mainly dispersed by wind, the Ixia corms and seeds are then transported by water or soil into urban bushland.  They often hybridise which does make it difficult to ascribe to a particular species.

Description

Ixias can grow to 1 m high and produce masses of compact spikes of yellow, orange or purple flowers during late winter and early spring. The corms are renewed annually and reproduction is by cormels on stolons and seed then dispersal by water and soil. The seedbank persists for up to 5 years. Generally Ixias will survive fire.

Impact on Bushland

If left Ixias will spread over bushland and impact on native plant communities. When introduced into urban bushland they can grow rapidly and become quite locally dominant.

Location

Found on lateritic loam, grey sand, sandy clay and granite in the South-West Province from Perth to Albany. They prefer disturbed areas and road verges.

Priority for removal

High: major threat to the conservation values of Banksia woodlands and South-West Province.

Management (hand)

Not available.

Management (herbicide)

Spot spray metsulfuron methyl 0.2 g/15 L + Pulse® (or 2.5 – 5g /ha + Pulse®) or 2,2 DPA 5 g/L+ Pulse®. Apply just on flowering at corm exhaustion. Optimum months for spraying are July, August and September.

Flowering month/s

August, September, October

Flower colour/s

Yellow, Purple, Orange

Information source

https://florabase.dpaw.wa.gov.au/browse/profile/1532

Additional information

https://florabase.dpaw.wa.gov.au/weeds/swanweeds/

Hussey, B.M.J., Keighery, G.J., Dodd, J., Lloyd, S.G. and Cousens, R.D. (2007) Western weeds. A guide to the weeds of Western Australia, Second Edition, The Weeds Society of Western Australia, Victoria Park, Western Australia.

Yellow Ixia images


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Location

Urban Bushland Council WA Inc

2 Delhi Street West Perth WA 6005

PO Box 326 West Perth WA 6872

(08) 9420 7207 (please leave a message)

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