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| Jacksonia nematoclada | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Faboideae |
| Genus: | Jacksonia |
| Species: | J. nematoclada |
| Binomial name | |
| Jacksonia nematoclada F.Muell. | |
| Synonyms | |
Jacksonia nematoclada is a species of flowering plant in the family Fabaceae and is endemic to inland Western Australia. It is a low, spreading shrub with sharply pointed phylloclades, yellow-orange flowers with red markings, and woody, densely hairy pods.
Description
Jacksonia nematoclada is a low, spreading, densely tufted shrub that typically grows up to 15–30 cm (5.9–11.8 in) high and 12–60 m (39–197 ft) wide, its branches greyish green and ribbed. Its end branches are sharply-pointed phylloclades, its leaves reduced to egg-shaped, dark brown scales, 0.8–1.8 mm (0.031–0.071 in) long and 0.4–1 mm (0.016–0.039 in) wide. The flowers are scattered near the ends of branches on a straight pedicel 2.8–3.9 mm (0.11–0.15 in) long. There are egg-shaped bracteoles 1.0–1.5 mm (0.039–0.059 in) long and 0.4–0.5 mm (0.016–0.020 in) wide on the pedicels. The floral tube is 0.8–1.5 mm (0.031–0.059 in) long and the sepals are membranous, the lobes 5.3–7.1 mm (0.21–0.28 in) long and 1.1–1.6 mm (0.043–0.063 in) wide. The standard petal is yellow-orange with red markings, 4.3–5.7 mm (0.17–0.22 in) long and 8.9–9.4 mm (0.35–0.37 in) wide, the wings yellow-orange with red markings, 5.0–5.8 mm (0.20–0.23 in) long, and the keel is red, 3.8–5 mm (0.15–0.20 in) long. The filaments of the stamens are green with a red tip, 2.7–5.6 mm (0.11–0.22 in) long. Flowering occurs from August to November, and the fruit is a woody, densely hairy, more or less spherical pod, 4.2–4.5 mm (0.17–0.18 in) long and 3.6–4.5 mm (0.14–0.18 in) wide.
Taxonomy
Jacksonia nematoclada was first formally described in 1876 by Ferdinand von Mueller in his Fragmenta Phytographiae Australiae from specimens collected near Mount Churchman by Jess Young. The specific epithet (nematoclada) means 'thread-like branch'.
Distribution and habitat
This species of Jacksonia grows in sandy or clayey soils on low rises and plains and is widespread in the Avon Wheatbelt, Coolgardie, Great Victoria Desert, Mallee and Murchison bioregions of inland Western Australia.
Conservation status
Jacksonia nematoclada is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.
References
- ^ "Jacksonia nematoclada". Australian Plant Census. Retrieved 22 December 2024.
- ^ Chappill, Jennifer A.; Wilkins, Carolyn F.; Crisp, Michael D. (2007). "Taxonomic revision of Jacksonia (Leguminosae: Mirbelieae)". Australian Systematic Botany. 20 (6): 561–563. doi:10.1071/SB06047.
- ^ "Jacksonia nematoclada". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- "Jacksonia nematoclada". Australian Plant Name Index. Retrieved 22 December 2024.
- von Mueller, Ferdinand (1876). Fragmenta Phytographiae Australiae. Vol. 10. Melbourne: Victorian Government Printer. pp. 50–51. Retrieved 22 December 2024.
- George, Alex; Sharr, Francis (2021). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 259. ISBN 9780958034180.
| Taxon identifiers | |
|---|---|
| Jacksonia nematoclada | |