Species of plant
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Pimelea simplex, commonly known as desert rice-flower, is a species of flowering plant in the family Thymelaeaceae and is endemic to inland Australia. It is a herb or semi-woody annual with narrowly elliptic to linear leaves, and compact heads of densely hairy white to yellowish-green flowers.
Description.
"Pimelea simplex" is herb or semi-woody annual that typically grows to a height of and has hairy young stems. The leaves are arranged alternately along the stems and are usually narrowly elliptic, long and wide on a short petiole. The flowers are bisexual and borne on the ends of branches in dense clusters of many white to yellowish-green flowers, the rachis densely covered with fine hairs. The floral tube is long, the sepals erect and long. Flowering occurs from June to October.
Taxonomy.
"Pimelea simplex" was first formally described in 1853 by Ferdinand von Mueller in the journal "Linnaea". The specific epithet, ("simplex") means "simple" or "undivided".
In 1983, S. Threlfall described two subspecies of "P. simplex" in the journal "Brunonia", and the names are accepted by the Australian Plant Census":
Distribution and habitat.
Subspecies "continua" tends to grow on soils on heavier texture than subsp. "simplex". Both species are found in inland Australia, but subsp. "simpex" has a wider distribution, occurring throughout most of South Australia, western New South Wales, central and south-western Queensland, and the far north-west of Victoria. Subspecies "continua" does not appear to occur in Victoria but is known from a few collections in the Northern Territory.
Conservation status.
"Pimelea simplex" is listed as "near threatened" under the northern Territory "Territory Parks and Wildlife Conservation Act".
References.
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