''Pomaderris aspera'', commonly known as hazel pomaderris, is a species of flowering plant in the family

Rhamnaceae The Rhamnaceae are a large Family (biology), family of flowering plants, mostly trees, shrubs, and some vines, commonly called the buckthorn family. Rhamnaceae is included in the order Rosales. The family contains about 55 genera and 950 specie ...

and is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to south-eastern Australia. It is a shrub or small tree with elliptic to lance-shaped or egg-shaped leaves and greenish-yellow flowers.

Description

''Pomaderris aspera'' is a shrub or small tree that typically grows to a height of , and has dark brown, fairly smooth bark with some fissures and longitudinal irregularities. The branchlets are covered with rust-coloured, star-shaped hairs when young. The leaves are elliptic to lance-shaped or egg-shaped, long and wide with more or less toothed edges. The upper surface of the leaves is dark green and impressed above the veins, the lower surface whitish with rust-coloured hairs on the veins. The flowers are borne in loose

panicle In botany, a panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a p ...

s long and are cream-coloured to greenish-yellow, each flower on a

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

long. The

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 Etymology The term ''sepalum'' ...

s are long and there are no petals. Flowering occurs in October and November and the fruit is a dark brown,

glabrous Glabrousness () is the technical term for a lack of hair, down, setae, trichomes, or other such covering. A glabrous surface may be a natural characteristic of all or part of a plant or animal, or be due to loss because of a physical condition, ...

capsule in diameter containing a single bone-coloured seed.

Taxonomy

Hazel pomaderris was first formally described in 1825 by

Augustin Pyramus de Candolle Augustin Pyramus (or Pyrame) de Candolle (, , ; 4 February 17789 September 1841) was a Swiss people, Swiss botany, botanist. René Louiche Desfontaines launched de Candolle's botanical career by recommending him at a herbarium. Within a couple ...

from an unpublished description by

Franz Sieber Franz Wilhelm Sieber (30 March 1789 – 17 December 1844) was a botanist and collector who travelled to Europe, the Middle East, Southern Africa and Australia. Early life Franz Sieber was born in Prague, Bohemia, on 30 March 1789. After five ...

. De Candolle's description was published in his '' Prodromus Systematis Naturalis Regni Vegetabilis''. The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

(''aspera'') means "rough".

Distribution and habitat

''Pomaderris aspera'' grows in wet forest, especially near streams in gullies and mainly occurs south from

Barrington Tops Barrington Tops is part of the Great Dividing Range in New South Wales, Australia, between Gloucester and Scone. In 1934, the area was difficult to access and was described as being "not traceable to any man-made feature". Part of the area has ...

in New South Wales and the Australian Capital Territory, with scattered individuals in northern New South Wales and as far north as

Bunya Mountains National Park Bunya Mountains is a national park in the South Burnett Region, Queensland, Australia. Geography The park includes much of the mountain range called the Bunya Mountains. The park encompasses the most westerly area of subtropical rainforest in ...

in Queensland. It is common in southern and eastern Victoria, less so in northern Tasmania and may also occur in South Australia. The species has also been naturalised in New Zealand.

References

{{Taxonbar, from=Q7227191 Flora of New South Wales

aspera Aspera may refer to: Music * Aspera (band), an American indie rock band * ''(a)spera'', a 2009 album by Mirah * Above Symmetry, a Norwegian progressive metal band originally known as Aspera * "Aspera", the lead track from ''We Will Become Like Bir ...

Flora of Victoria (state) Flora of Queensland Flora of the Australian Capital Territory Flora of Tasmania Trees of Australia