The Zanthus Siding is 105 kilometres past Karonie.
A bit of literary licence was used for this name – it is derived from the Latin genus name for the Kangaroo Paw (Anigozanthus/Anigosanthus), the floral emblem of Western Australia.
The siding was named in 1917 when the railway was built.
W.A. Year Book 1902-04, page 143.