Acacia horridula

Life-forms

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids I
Ordo: Fabales

Familia: Fabaceae
Subfamilia: Caesalpinioideae
Tribus: Acacieae
Genus: Acacia
Species: Acacia horridula
Name

Acacia horridula Meisn.
References

J. G. C. Lehmann, Pl. Preiss. 1:9. 1844
USDA, ARS, Germplasm Resources Information Network. Acacia horridula in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10.

Acacia horridula is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to south western Australia.

Description

The slender single-stemmed shrub typically grows to a height of 0.3 to 0.6 metres (1 to 2 ft) and produces yellow flowers from May to August.[1] It usuaully has red-brown to light brown coloured branchlets that are covered in a dense mat of woolly hairs and setaceous to narrowly triangular stipules with a length of 2.5 to 4 mm (0.098 to 0.157 in). Like most species of Acacia it has phyllodes rather than true leaves. The evergreen patent phyllodes are usually crowded on the branchlets and have a narrowly semi-trullate shape.[2] The simple inflorescences occur singly in the axils with spherical heads containing four pale yellow flowers. The terete, red-brown and striated seed pods that form after flowering are curved and narrowed at both ends with a length of up to 7.5 cm (3.0 in) and a width of around 3.5 mm (0.14 in). The oblong seeds inside are arranged longitudinally and are 4 to 5 mm (0.16 to 0.20 in) in length with a conical and terminal aril.[2]
Taxonomy

The species was first formally described by the botanist Carl Meissner in 1844 as part of the work Leguminosae in Plantae Preissianae'. It was reclassified as Racosperma horridulum by Leslie Pedley in 2003 and then transferred back to genus Acacia in 2006.[3]
Distribution

It is native to an area along the south coast in the Peel and South West regions of Western Australia.[1][4] It is often situated on rocky hillsides growing in sandy or gravelly soils over granite[1] particularly in the Darling Range usually as a part of Eucalyptus woodland communities.[2]
See also

List of Acacia species

References

"Acacia horridula". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Acacia horridula Meisn". Wattle - Acacias of Australia. Lucid Central. Retrieved 13 June 2020.
"Acacia horridula Meisn". Atlas of Living Australia. Atlas of Living Australia. Retrieved 13 June 2020.
"Acacia horridula Meisn". Kewscience. 2017. Retrieved 2018-06-01.