Species of plant
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Cassinia arcuata, commonly known as drooping cassinia, biddy bush, Chinese scrub, sifton bush and Chinese shrub, is a species of flowering plant in the family Asteraceae and is endemic to Australia. It is a shrub, sometimes a small tree with sessile, linear leaves, and heads of up to two hundred brownish flowers arranged in pyramid-shaped panicles. In New South Wales, the species is known as "Cassinia sifton". In disturbed areas, "C. arcuata" can become weedy.
Description.
"Cassinia arcuata" is a densely-branched, erect shrub or small tree that typically grows to a height of but sometimes to , with densely cottony-hairy branches and sometimes a curry-like aroma. The leaves are linear, long and wide with the edges rolled under. Up to two hundred heads are arranged in pyramid-shaped panicles long with involucral bracts about long in four whorls around each of two or three brownish florets. Flowering mostly occurs from January to May and the achenes are long with a pappus of twenty-two to twenty-eight bristles long.
Taxonomy and naming.
"Cassinia arcuata" was first formally described in 1818 by Robert Brown in "Transactions of the Linnean Society of London".
"Cassinia sifton" has been confused with "C. arcuata" and the National Herbarium of New South Wales lists only "C. sifton" as occurring in New South Wales. Plants of the World Online list both species as occurring in New South Wales.
Richard Hind Cambage used the name "Sifting Bush" for this species in 1902, comparing the fallen florets to "the 'siftings' which are blown away from grain by a winnowing machine". That name has since been corrupted to 'Sifton bush' in the mistaken belief that it referred to a person named Sifton.
The National Herbarium of Victoria considers "C. sifton" to be "widespread and common" in Victoria and that records prior to 2017 refer to that species. 
Distribution and habitat.
According to the Australian Plant Census, "C. arcuata" occurs in Western Australia, South Australia, New South Wales, the Australian Capital Territory and Victoria. It grows in mallee and woodland, and invades disturbed areas.
Use in horticulture.
Drooping cassinia is an easily cultivated plant. It requires well-drained soils, grows in full or partial shade, but does not tolerate salt winds and is not long-lived.
References.
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