Eremophila hygrophana

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Blue emu bush
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Lamiales
Family: Scrophulariaceae
Genus: Eremophila
Species:
E. hygrophana
Binomial name
Eremophila hygrophana

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.

Eremophila 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]

E. hygrophana growing near Wiluna
E. hygrophana flower detail
E. hygrophana flowers

Taxonomy and naming

Eremophila 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

This 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

Use in horticulture

References

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