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Mouse bush – Homoranthus papillatus

Common name

mouse bush

Scientific name

Homoranthus papillatus

Kingdom

plants

Class

Rosopsida (higher dicots)

Family

Myrtaceae (Myrtaceae)

NCA status

Vulnerable

EPBC status

-

Wetland indicator

Endemicity

Unknown endemicity - native

Habitat

Homoranthus papillatus occurs in pockets of decomposed granite with other heathy shrubs, on high exposed rock pavements and in adjoining heathy eucalypt woodland (Queensland Herbarium, 2012).

Description

Homoranthus papillatus is a low, compact, spreading shrub to about 1 m tall, sometimes with a strong odour. The leaves are opposite, very shortly petiolate, linear, curved, triangular in cross-section, 10 mm long by about 1 mm wide and thick, with oil dots; the surfaces are covered in minute papillae (visible under a microscope only). The flowers are pale yellow, 4 mm long, tubular, with five small petals and a long protruding style 6 to 9 mm long., they occur singly in the upper leaf axils on pedicels 1 to 2 mm long. Bracteoles that enclose the flower buds are 5 mm long, scarious, caducous. The calyx tube is 4 mm long and 1 mm diameter, glabrous, shiny, smooth and distinctly 5-ribbed. The calyx lobes are subulate to 3 mm long. The petals are orbicular, and about 1mm diameter. There are 10 stamens with the filaments about 0.5 mm long. There are 10 staminodes about 0.5 mm long. The ovary is unilocular, containing 8 to 10 ovules borne on a basal placenta. The fruit is dry, similar to the flower, containing 1 to 2 winged seeds (Byrnes, 1981; Stanley, 1986).
Homoranthus papillatus is similar Homoranthus montanus and the latter is known from the Granite Belt at Sundown National Park and Glen Aplin area, although it does not occur in Girraween National Park. Homoranthus papillatus differs from Homoranthus montanus by the absence of the minute papillae from the leaf surfaces and in its taller and more upright growth habit (Byrnes, 1981; Sparshott, 2007).

Reproduction

Homoranthus papillatus flowers from August to November (Queensland Herbarium, 2012).

Predators

(no information available)

Parasites/pathogens

(no information available)

Threatening Processes

Potential threats to Homoranthus papillatus are trampling by visitors due to its distribution on high visitation rock pavement areas, and inappropriate fire regimes (Sparshott, 2007).

Human uses

(no information available)

References

Byrnes, N. (1981). Notes on the genus Homoranthus. Austrobaileya 1 (4): 373.
Queensland Herbarium (2012). Specimen label information. Queensland Herbarium. Accessed 19/01/2012.
Sparshott, K. (2007). Protecting the values of Girraween National Park - Comprehensive Vegetation Report. Department of Environment and Resource Management.
Stanley, T.D. in Stanley, T.D. and Ross, E.M. (1986). Flora of South-eastern Queensland 2: 121.

Notes

Occurs in the following Queensland pastoral districts: Darling Downs.

Further resources


This page should be cited as:

Mouse bush – Homoranthus papillatus, WetlandInfo, Department of Environment and Science, Queensland, viewed 22 September 2018, <https://wetlandinfo.des.qld.gov.au/wetlands/ecology/components/species/?homoranthus-papillatus>.

Queensland Government
WetlandInfo   —   Department of Environment and Science