Pomaderris gilmourii explained

Pomaderris gilmourii is a species of flowering plant in the family Rhamnaceae and is endemic to Deua National Park in New South Wales. It is a shrub with hairy young stems, egg-shaped to elliptic leaves, and clusters of silvery buds and creamy-yellow flowers.

Description

Pomaderris gilmourii is a shrub that typically grows to a height of up to, its young stems hairy. The leaves are egg-shaped or lance-shaped with the narrower end towards the base or narrowly elliptic, long and wide on a petiole long with stipules up to long at the base but that fall off as the leaf develops. The upper surface of the leaves is more or less glabrous and the lower surface densely covered with star-shaped or simple hairs. The flowers are borne in panicles in diameter on the ends of branchlets, each flower on a pedicel long. The sepals are oblong, cream-coloured or yellow with silvery hairs on the back and there are no petals.^{[1] [2] [3]}

Taxonomy

Pomaderris gilmourii was first formally described in 1989 by Neville Grant Walsh in the journal Muelleria from specimens he collected in Deua National Park in 1987.^[4] The specific epithet (gilmourii) honours "Mr Phil. Gilmour, formerly of Canberra who first collected this species".

In the same journal, Walsh described two varieties and the names are accepted by the Australian Plant Census:

• Pomaderris gilmourii var. cana N.G.Walsh,^[5] commonly known as grey Deua pomaderris,^[6] that has leaves with a dull lower surface, foliage without a dense layer of woolly hairs, and leaves without a distinct, thickened edge on the lower surface;^[7]
• Pomaderris gilmourii N.G.Walsh var. gilmourii N.G.Walsh^[8] that has a dense, shiny layer of simple hairs on the lower surface of the leaves petioles and branchlets, and a distinct, thickened on the edges of the lower surface of the leaves.^[9]

Distribution and habitat

This pomaderris grows in shrubland or forest on rhyolite outcrops in Deua National Park, inland from Moruya.

Conservation status

Pomaderris gilmourii var. cana is listed as "vulnerable" under the Australian Government Environment Protection and Biodiversity Conservation Act 1999 and the New South Wales Government Biodiversity Conservation Act 2016 (previously the Threatened Species Conservation Act 1995.^[10]

Notes and References

1. Walsh . Neville G. . Two new species of Pomaderris Labill. (Rhamnaceae) from south-eastern Australia . Muelleria . 1997 . 10 . 40–41 . 4 February 2022.
2. Web site: Harden . Gwen J. . Pomaderris gilmourii . Royal Botanic Garden Sydney . 19 February 2022.
3. Web site: Wood . Betty . Pomaderris gilmourii . Lucid keys . 19 February 2022.
4. Web site: Pomaderris gilmourii . Australian Plant Name Index . 19 February 2022.
5. Web site: Pomaderris gilmourii var. cana . Australian Plant Census . 19 February 2022.
6. Web site: Grey Deua Pomaderris - profile . New South Wales Government Office of Environment and Heritage . 19 February 2022.
7. Web site: Harden . Gwen J. . Pomaderris gilmourii var. cana . Royal Botanic Garden Sydney . 19 February 2022.
8. Web site: Pomaderris gilmourii var. gilmourii . Australian Plant Census . 19 February 2022.
9. Web site: Harden . Gwen J. . Pomaderris gilmourii var. gilmourii . Royal Botanic Garden Sydney . 19 February 2022.
10. Web site: Approved Conservation Advice for Pomaderris gilmourii var. cana (Grey Deua Pomaderris). Australian Government Department of Agriculture, Water and the Environment . 19 February 2022.