Phebalium squamulosum
| Scaly phebalium | |
|---|---|
| |
| Phebalium squamulosum subsp. squamulosum in the ANBG | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Sapindales |
| Family: | Rutaceae |
| Genus: | Phebalium |
| Species: | P. squamulosum
|
| Binomial name | |
| Phebalium squamulosum | |
| Synonyms[1] | |
| |
Phebalium squamulosum , commonly known as scaly phebalium[2] or forest phebalium,[3] is a species of shrub or slender tree that is endemic to eastern Australia. It has smooth branches covered with rust-coloured scales, linear to elliptical or egg-shaped leaves with the narrower end towards the base, and pale to bright yellow flowers in umbels with rust-coloured or silvery scales on the back.
Description
[edit]Phebalium squamulosum is a shrub that typically grows to a height of 3 m (9.8 ft), sometimes a slender tree to 7 m (23 ft). It has smooth branchlets covered with rust-coloured scales. The leaves are papery or leathery, linear to elliptical or egg-shaped with the narrower end towards the base, 7–70 mm (0.28–2.76 in) long and 1.5–8 mm (0.059–0.315 in) wide on a petiole 0.5–4 mm (0.020–0.157 in) long. The upper surface of the leaves is more or less glabrous but the lower side is covered with silvery to rust-coloured scales and star-shaped hairs. Between five and ten or more flowers are arranged in umbels on the ends of branchlets, each flower on a pedicel 3–8 mm (0.12–0.31 in) long. The calyx is hemispherical to top-shaped, 0.5–1.5 mm (0.020–0.059 in) long and 1.2–2 mm (0.047–0.079 in) wide, glabrous on the inside and covered with scales on the outside. The petals are pale to bright yellow or cream-coloured, elliptical, 2–4.5 mm (0.079–0.177 in) long with silvery to rust-coloured scales on the back. The fruit is a follicle about 3.5 mm (0.14 in) long and erect.[2][3][4][5]
Taxonomy
[edit]Phebalium squamulosum was first formally described in 1805 by Étienne Pierre Ventenat in his book Jardin de la Malmaison and was the first species in the genus to be described.[6][7]
In 1970, Paul Wilson described ten subspecies, eight of which are now accepted by the Australian Plant Census:[4]
- P. squamulosum subsp. alpinum (Benth.) Paul G.Wilson[8]
- P. squamulosum subsp. argenteum Paul G.Wilson[9]
- P. squamulosum subsp. coriaceum Paul G.Wilson[10]
- P. squamulosum subsp. gracile Paul G.Wilson[11]
- P. squamulosum subsp. lineare Paul G.Wilson[12]
- P. squamulosum subsp. ozothamnoides (F.Muell.) Paul G.Wilson[13]
- P. squamulosum subsp. parvifolium Paul G.Wilson[14]
- P. squamulosum Vent. subsp. squamulosum[15]
There are many intergrades between subspecies and it is sometimes difficult to satisfactorily assign some plants to a taxon.[2]
Distribution and habitat
[edit]Scaly phebalium is widespread, mainly growing in heath and forest on sandstone. It is found in northern and south-eastern Queensland, eastern New South Wales and eastern Victoria.[2][3][16]
Use in horticulture
[edit]Phebalium squamulosum is cultivated as an ornamental flowering shrub. The species is frost tolerant and performs best in a well-drained, partially shaded position with a cool, moist root zone.[17]
Image gallery
[edit]-
P. squamulosum, Ku-ring-gai Chase National Park, 19 August 2017 -
P. squamulosum buds, Ku-ring-gai Chase National Park, 24 July 2011 -
P. squamulosum subsp. ozothamnoides, Hassans Walls near Lithgow, 19 September 2017 -
P. squamulosum subsp. gracile, in the ANBG -
P. squamulosum subsp. lineare, in the ANBG
References
[edit]- ^ a b "Phebalium squamulosum". Australian Plant Census. Retrieved 22 June 2020.
- ^ a b c d Weston, Peter H.; Harden, Gwen J. "Phebalium squamulosum". Royal Botanic Gardens Sydney. Retrieved 22 June 2020.
- ^ a b c Duretto, Marco F. "Phebalium squamulosum". Royal Botanic Gardens Victoria. Retrieved 22 June 2020.
- ^ a b Wilson, Paul G. (1970). "A Taxonomic Revision of the Genera Crowea, Eriostemon and Phebalium (Rutaceae). Nuytsia 1(1):". Nuytsia. 1 (1): 80–87. Retrieved 22 June 2020.
- ^ Wilson, Paul G. "Phebalium squamulosum". Australian Biological Resources Study, Department of Agriculture, Water and the Environment, Canberra. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum". APNI. Retrieved 22 June 2017.
- ^ Ventenat, Étienne Pierre (1805). Jardin de la Malmaison (Volume 2). Paris: De l'imprimerie de Crapelet, et se trouve chez l'auteur. pp. 102–103. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. alpinum". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. argenteum". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. coriaceum". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. gracile". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. lineare". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. ozothamnoides". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. parvifolium". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum subsp. squamulosum". Australian Plant Census. Retrieved 22 June 2020.
- ^ "Phebalium squamulosum". Australian Native Plants Society (Australia). Retrieved 22 June 2020.
- ^ Greig, D. (1987). The Australian Gardener's Wildflower Catalogue. Australia: Angus & Robertson. ISBN 0-207-15460-0.
Media related to Phebalium squamulosum at Wikimedia Commons