Gastrolobium leakeanum

Gastrolobium leakeanum, commonly known as the mountain pea, is a plant in the pea family Fabaceae that is endemic to a small area in the south-west of Western Australia. It is an erect or sprawling shrub to about 2 m (6 ft 7 in) high, with red to orange or yellow flowers in spring.

Mountain pea
G. leakeanum on Bluff Knoll, Stirling Range National Park.

Priority Two — Poorly Known Taxa (DEC)
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Rosids
Order:
Fabales
Family:
Fabaceae
Genus:
Gastrolobium
Species:
G. leakeanum
Binomial name
Gastrolobium leakeanum
Synonyms[1]

Description

Gastrolobium leakeanum was described by James Drummond as being "twelve to fifteen feet (3.7–4.6m) high with opposite leaves three inches long (76mm) by two broad (51mm) and bears clusters of large deep scarlet flowers in the axils of the leaves".[2]

Taxonomy and naming

Gastrolobium leakeanum is one of about 100 species of Gastrolobium. It was first described by James Drummond in the Perth newspaper, The Inquirer on 6 December 1848. Drummond was a prolific contributor to Perth newspapers.[3] The species was subsequently described in William Hooker's Journal of Botany and Kew Garden Miscellany.[2] The specific epithet (leakeanum) refers to Mr George Leake, a leading member of Perth society and husband of the botanical illustrator, Georgiana Leake.[4]

Distribution and habitat

Mountain pea grows on mountaintops, ridges and steep slopes in sandy clay or loam over quartzite or in stony soils.[5] It is found in the Esperance Plains and Mallee biogeographic regions of Western Australia.[6]

Conservation status

This species is classified as "Priority Two" by the Western Australian Government Department of Parks and Wildlife[6] meaning that it is poorly known and from only one or a few locations.[7][8] It has been shown in glasshouse experiments to be susceptible to the fungus Phytophthora cinnamomi.[9]

Use in horticulture

As with other members of its genus, G. leakeanum has been avoided in cultivation, probably because of the poisonous components in its foliage.[10]

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References
  1. "Gastrolobium leakeanum". Australian Plant Census. Retrieved 25 November 2019.
  2. Hooker, William (1849). Journal of Botany and Kew Garden Miscellany. London: Reeve, Benham and Reeve. p. 247. Retrieved 17 February 2015.
  3. Barker, R.M. (1996). "James Drummond's newspaper accounts of his collecting activities, in particular his 4th Collection and Hakea victoria (Proteaceae)" (PDF). Nuytsia. 11 (1): 1. Retrieved 18 February 2015.
  4. "Leake, Georgiana Mary (1812 - 1869)". Australian National Herbarium. Retrieved 18 February 2015.
  5. Paczkowska, Grazyna; Chapman, Alex R. (2000). The Western Australian flora : a descriptive catalogue. Perth: Wildflower Society of Western Australia. p. 442. ISBN 978-0646402437.
  6. "Gastrolobium leakeanum". FloraBase. Western Australian Government Department of Parks and Wildlife.
  7. "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 25 November 2019.
  8. "Specimen: CBG 9310943 Gastrolobium leakeanum". Australia's Virtual Herbarium. Retrieved 18 February 2015.
  9. "Western Australian Natives Susceptible to Phytophthora cinnamomi" (PDF). Centre for Phytophthora Science & Management (CPSM). Retrieved 18 February 2015.
  10. Wrigley, John; Fagg, Murray (1983). Australian native plants : a manual for their propagation, cultivation and use in landscaping (2nd ed.). Sydney: Collins. p. 219. ISBN 978-0002165754.
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