Acacia johannis
| Acacia johannis | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fabales |
| Family: | Fabaceae |
| Subfamily: | Caesalpinioideae |
| Clade: | Mimosoid clade |
| Genus: | Acacia |
| Species: | A. johannis |
| Binomial name | |
| Acacia johannis | |
 | |
| Occurrence data from AVH | |
| Synonyms | |
| |
Acacia johannis is a species of flowering plant in the family Fabaceae and is endemic to a restricted area of north Queensland, Australia. It is a shrub with narrowly elliptic, markedly sickle-shaped phyllodes, heads of lemon-yellow flowers and linear, glabrous, thinly leathery pods, more or less constricted between the seeds.
Description
Acacia johannis is a shrub that typically grows to a height of up to 2 m (6 ft 7 in) and has glabrous, reddish-brown branchlets with many lenticels. Its phyllodes are narrowly elliptic and markedly sickle-shaped, 140–180 mm (5.5–7.1 in) long, mostly 5–10 mm (0.20–0.39 in) wide and glabrous with three or four prominent longitudinal veins and a prominent gland at the base. The flowers are borne in one or two heads in axils on a glabrous peduncle 10–20 mm (0.39–0.79 in) long, each head with about fifty lemon-yellow flowers. Flowering has been observed in February and April, and the pods are linear, 70–100 mm (2.8–3.9 in) long, 5–7 mm (0.20–0.28 in) wide, thinly leathery and glabrous, shallowly to moderately constricted between the seeds. The seeds are elliptic, 3.0–3.5 mm (0.12–0.14 in) long, about 2.5 mm (0.098 in) wide and dark brown with a club-shaped aril.[2][3][4]
Taxonomy
Acacia johannis was first formally described in 1999 by the botanist Leslie Pedley in the journal Austrobaileya from specimens collected on Mount Mulligan in 1990.[2][5] The specific epithet (johannis) is derived from the Latin for 'John', honouring John R. Clarkson, who collected the type specimen, and "has significantly increased knowledge of plants species and communities of the region".[2]
Distribution and habitat
This species of wattle is restricted to north-eastern Queensland where it is common around Mount Mulligan on rock outcrops and pavements in soils derived from sandstone, where it sometimes forms dense thickets.[2][3]
Conservation status
Acacia johannis is listed as 'least concern' under the Queensland Government Nature Conservation Act 1992.[6]
See also
References
- ↑ "Acacia johannis". Australian Plant Census. Retrieved 3 July 2026.
- 1 2 3 4 Pedley, Leslie (1999). "Notes on Acacia (Leguminosae: Mimosoideae) chiefly from northern Australia". Austrobaileya. 5 (2): 311–312. Retrieved 3 July 2026.
- 1 2 Pedley, Leslie. Maslin, Bruce R.; Kodela, Phillip G. (eds.). "Acacia johannis". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 3 July 2026.
- ↑ "Acacia johannis Pedley". Wattle - Acacias of Australia. Lucid Central. Retrieved 30 November 2020.
- ↑ "Acacia johannis". Australian Plant Name Index. Retrieved 3 July 2026.
- ↑ "Acacia johannis". Queensland Government WildNet. Retrieved 3 July 2026.