Species of plant
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Pimelea serpyllifolia, commonly known as thyme riceflower, is a species of flowering plant in the family Thymelaeaceae and is endemic to southern Australia. It is an erect shrub with narrowly elliptic to spatula-shaped leaves, and compact heads of 4 to 12 yellow, yellowish-green or white flowers surrounded by 2 or 4 leaf-like involucral bracts. Male and female flowers are borne on separate plants.
Description.
"Pimelea serpyllifolia" is an erect shrub that typically grows to a height of , but is rarely stunted or prostrate in exposed positions. The leaves are borne in opposite pairs on glabrous stems and are crowded, narrowly elliptic to spatula-shaped, long and wide. The leaves are glabrous, and the same shade of green on both sides. The flowers are borne in compact heads of 4 to 12 yellow, yellowish-green or white flowers surrounded by 2 or 4 sessile, elliptic involucral bracts long and wide, female and male flowers borne on separate plants. The floral tube of female plants is long, the sepals long, and of male plants and long respectively.
Taxonomy.
"Pimelea serpyllifolia" was first formally described in 1810 by Robert Brown in his "Prodromus Florae Novae Hollandiae et Insulae Van Diemen". The specific epithet, "serpyllifolia" means "wild thyme-leaved".
In 1988, Barbara Lynette Rye named two subspecies of "P. serpyllifolia" in the journal "Nuytsia", and the names are accepted by the Australian Plant Census":
Distribution and habitat.
Subspecies "serpyllifolia" grows in shrubland and woodland mostly in near-coastal areas of Victoria and South Australia, but also in the far north-west of Victoria. There are also small populations near Euston in far south-western New South Wales, near Eucla in Western Australia, and in a few places in north-eastern Tasmania and on Bass Strait Islands. Subspecies "occidentalis" grows in near-coastal areas between Israelite Bay and Twilight Cove in southern Western Australia.
Conservation status.
"Pimelea serpyllifolia" subsp. "serpyllifolia" is listed as "endangered" in New South Wales under the New South Wales Government "Biodiversity Conservation Act 2016".
References.
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