Distribution
Banksia rosserae is known only from an area south-south-east of Mount Magnet in inland Western Australia. There are 27 plants known, all occurring within a radius of about 20 kilometres (12 mi). The area is around 200 kilometres (125 mi) from where other Banksia species are known to occur, representing "a significant extension of range into the arid zone and a significant geographic disjunction for the genus."
Although most of the land around Mount Magnet has the heavy clay soil and Acacia aneura (Mulga) scrub common throughout semi-arid Western Australia, the area on which B. rosserae occurs is unusual in having deep yellow sand and laterite. It occurs there with mallee Eucalyptus species, over open heath of Grevillea, Hakea, Leptospermum, Melaleuca, Cryptandra and Triodia species. Thus the flora is more like that found on the Swan Coastal Plain than the arid zone in which it occurs.
Read more about this topic: Banksia Rosserae
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