Flora Survey / Wildflower Society of WA

Survey of South Trigg Reserve conducted Sunday, 3rd July 2016

Considering its location in the city this piece of bushland is in very good condition and contains a range of species characteristic of the Quindalup dune system (Table 1).  It provides a very good example of the type of plants found on the beach and the primary and secondary dunes. Much of this community has been cleared along the Perth coastline and is a valuable addition to the Trigg Bushland in terms of forming a vegetation transect from the beach to inland plant communities.  The vegetation in this block, including the introduced species, is stabilising the dunes but any major disturbance would result in a much more mobile sand drift. Apart from the few introduced perennial species there are few annual and grassy weeds thus creating bare sand patches which form prime reptile habitat. There is some evidence of rabbits but these do not appear to be responsible for a lot of damage. Local cats may be keeping these under control.   Shrubs such as Agonis flexuosa and Acacia rostellifera provide shelter for birds such as the Singing Honeyeater (observed). No native pellitory (Parietaria debilis) was found as this would be subject to rabbit grazing. The cycle path along the east of the block provides a quiet walk or cycle and an opportunity to look for birds and wildflowers.

Table 1 Plant species recorded in South Trigg Reserve

Species Common name
Acacia rostellifera Summer scented wattle
Acanthocarpus preissii Prickle lily
Agonis flexuosa (?planted) Peppermint
Atriplex isatidea Saltbush
Callitris preissii Sand Cypress
Carpobrotus virescens Pigface (native)
Conostylis candicans Grey cottonhead
Eucalyptus sp (planted)
Exocarpos sparteus Boom ballart
Hardenbergia comptoniana Native Wisteria
Lepidosperma gladiatum Coast sword sedge
Myoporum insulare Boobiala
Olearia axillaris Coastal daisy
Rhagodia baccata Seaberry saltbush
Scaevola crassifolia Thick leaved fan flower
Spinifex hirsutus Hairy spinifex
Spinifex longifolius Longleaved spinifex
Spyridium globulosum Basket bush
Threlkeldia diffusa Coast bonefruit
*Lepidosperma laevigata (planted) Coast teatree (native to Vic and SA)
*Pelargonium capitatum Rose pelargonium
*Tetragonia decumbens Sea spinach
*Trachyandra divaricata Onion weed

Judith Harvey – BSc Environmental Science, Murdoch University,
Masters in Philosophy, Curtin University Department of Environment and Agriculture.

Member of the Wildflower Society for 35 years.

Download pdf of this report south-trigg-beach-reserve-vegetation-v2


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