Hakea trineura

Hakea trineura
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Proteales
Family:	Proteaceae
Genus:	Hakea
Species:	H. trineura
Binomial name
Hakea trineura (F.Muell.)F.Muell.[1]

Hakea trineura is a species of flowering plant in the family Proteaceae. It is endemic to Queensland, Australia. The branches and leaves are covered with rusty hairs and the pendulous flowers are greenish-yellow.

Description

Hakea trineura is a multi-stemmed shrub growing to 1–3 m (3–10 ft) high and forms a lignotuber. The branchlets and new leaf growth have flattened, brown, short soft silky hairs, or are smooth. The leaves grow on a petiole about 1–2.5 cm (0.39–0.98 in) long. They are narrowly elliptic to egg-shaped 7–20 cm (3–8 in) long by 1.3–7 cm (0.5–3 in) wide with three distinct longitudinal veins. The leaves narrow gradually to the apex ending either with a sharp point or rounded. The inflorescence consists of 60-80 greenish-yellow flowers on a smooth or with sparsely flattened soft hairs on a rachis up to 40–70 mm (2–3 in) long. The mid-green pedicel 2.3–3 mm (0.09–0.1 in) long and smooth. The deep yellow perianths are 7–8.5 mm (0.3–0.3 in) long and are smooth or with a few hairs when in bud. The styles are mid-green and the pistil 18–26 mm (0.71–1.02 in) long. Flowering occurs from May to September and the fruit are smooth, obliquely egg-shaped 2–4 cm (0.8–2 in) long by 1.5–2 cm (0.6–0.8 in) wide and slightly curved.[2][3][4]

Taxonomy and naming

Hakea trineura was first formally described in 1868 by Ferdinand von Mueller who gave it the name Grevillea trineura and published the description in Fragmenta Phytographiae Australiae.[5][6] In 1868, Mueller changed the name to Hakea trineura.[7] It is said to be named from the Greek trineura, referring to the three-veined leaves.[2] Trineura is however not attested in ancient Greek.[8]

Distribution and habitat

Hakea trineura is restricted to the Maryborough to Rockhampton area of Queensland. It grows in hilly eucalyptus woodland over hummock grasslands. It is a quick growing shrub in tropical areas.[2][3]

Conservation status

Hakea trineura is listed as "vulnerable" by the Australian Department of the Environment Protection and Biodiversity Conservation Act.[3]

References

1. "Hakea trineura". Australian Plant Census. Retrieved 29 July 2019.
2. Holliday, Ivan (2005). Hakeas:A Field and Garden Guide. Reed New Holland. ISBN 1-877069-14-0.
3. "Fact Sheet:Hakea trineura". Government of South Australia. Retrieved 19 October 2018.
4. Barker, Robyn M.; Haegi, Laurence A.; Barker, William R. (1999). Flora of Australia Volume 17B Proteaceae 3 Hakeas to Dryandra. ABRS. ISBN 0-643-06454-0.
5. "Grevillea trineura". Australian Plant Name Index. Retrieved 29 July 2019.
6. "Grevillea trineura". Biodiversity Heritage Library. Retrieved 29 July 2019.
7. "Hakea trineura". Australian Plant Name Index. Retrieved 29 July 2019.
8. Liddell, H.G. & Scott, R. (1940). A Greek-English Lexicon revised and augmented throughout by Sir Henry Stuart Jones with the assistance of. Roderick McKenzie. Oxford: Clarendon Press.