Eremophila hygrophana, also known as the blue emu bush,[2] is a flowering plant in the figwort family, Scrophulariaceae and is endemic to Australia. It is an erect, compact shrub with crowded, grey leaves and violet to purple flowers and is found in South Australia and Western Australia.
| Blue emu bush | |
|---|---|
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Scrophulariaceae |
| Genus: | Eremophila |
| Species: | E. hygrophana
|
| Binomial name | |
| Eremophila hygrophana | |
Description
editEremophila hygrophana is an erect, compact, highly branched shrub which grows to a height of between 0.3 and 1.2 m (1 and 4 ft) and which has its leaves and branches covered with both glandular hairs and yellow or grey branched hairs. The older parts of the branches are rough due to persistent leaf bases. The leaves are densely clustered at the ends of the branches and are furry, thick, linear to lance-shaped and mostly 12–25 mm (0.5–1 in) long and 2.5–5 mm (0.1–0.2 in) wide.[3][4]
The flowers are borne singly in leaf axils and lack a stalk. There are 5 green, hairy, triangular to lance-shaped sepals which are 6.5–12 mm (0.3–0.5 in) long. The petals are 20–30 mm (0.8–1 in) long and are joined at their lower end to form a tube. The petal tube is pale violet to purple on the outside and paler, spotted purple inside the tube. As the flowers age, their colour changes to dark reddish brown. The outside of the tube and petal lobes are hairy but the inside of the lobes is glabrous and the inside of the tube is woolly. The 4 stamens are fully enclosed in the petal tube. Flowering occurs from July to December and is followed by fruits which are oval-shaped to cone-shaped with a hairy covering and 6–8 mm (0.2–0.3 in) long.[3][4]
.jpg)
.jpg)
Taxonomy and naming
editEremophila hygrophana was first formally described by Robert Chinnock in 2007 and the description was published in Eremophila and Allied Genera: A Monograph of the Plant Family Myoporaceae.[5] The specific epithet (hygrophana) is derived from Ancient Greek words meaning "changing colour during the drying process".[3]
Distribution and habitat
editThis eremophila occurs mostly commonly in Western Australia where it is found from near Rawlinna to Mount Magnet, growing in the Gibson Desert, Little Sandy Desert, Murchison, Nullarbor Plain and Yalgoo biogeographic regions.[6][7] It is also found in the extreme central west of South Australia. A single record from the Northern Territory may be a new, as yet undescribed species.[3]
Conservation status
editEremophila hygrophana is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.[6]
Use in horticulture
editThis small eremophila is one of the most attractive in cultivation with its sometimes golden, furry leaves and large purple flowers which are present through most months. It grows particularly well in Melbourne. It, especially the cultivar "Blue Bells", is well known in gardens in the drier parts of the United States. It can be propagated from cuttings taken in warm weather, or by grafting onto Myoporum rootstock. Grafted plants perform better in heavy soils. It is tolerant of drought but not humidity so a sunny, open position is preferred. It is tolerant of light frost, although may need a light pruning to remove frost damaged branches.[8][9][10]
References
edit- ^ "Eremophila hygrophana". Australian Plant Census. Retrieved 23 May 2020.
- ^ Allman, John (23 April 2016). "Eremophila hygrophana - The Blue Emu Bush". Nurseries Online. Retrieved 25 October 2023.
- ^ a b c d Chinnock, R.J. (Bob) (2007). Eremophila and allied genera : a monograph of the plant family Myoporaceae (1st ed.). Dural, NSW: Rosenberg. pp. 472–473. ISBN 9781877058165.
- ^ a b Brown, Andrew; Buirchell, Bevan (2011). A field guide to the eremophilas of Western Australia (1st ed.). Hamilton Hill, W.A.: Simon Nevill Publications. p. 149. ISBN 9780980348156.
- ^ "Eremophila hygrophana". APNI. Retrieved 3 February 2016.
- ^ a b "Eremophila hygrophana". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 337. ISBN 0646402439.
- ^ Boschen, Norma; Goods, Maree; Wait, Russell (2008). Australia's eremophilas : changing gardens for a changing climate. Melbourne: Bloomings Books. pp. 206–207. ISBN 9781876473655.
- ^ Gard, Karen. "Be a Water Miser" (PDF). University of California Division of Agriculture and Natural Resources. Retrieved 3 February 2016.
- ^ "Beautiful & Drought Tolerant: Flowering Shrubs". Birds and Blooms. 25 August 2020. Retrieved 3 February 2016.