| Hakea rigida | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Proteales |
| Family: | Proteaceae |
| Genus: | Hakea |
| Species: | H. rigida |
| Binomial name | |
| Hakea rigida | |
 | |
| Occurrence data from Australasian Virtual Herbarium | |
Hakea rigida is a flowering plant in the family Proteaceae with a restricted distribution and endemic to the western Goldfields region of Western Australia. It is a dense shrub with grey bark and sprays of pink flowers in spring.
Hakea rigida is a dense, erect to spreading shrub 0.6–2.7 m (2–9 ft) high and wide. The small branches are densely matted with silky hairs at flowering. The dark green leaves are variable, they may be needle-like 3.5–14 cm (1–6 in) long, 1–2 mm (0.04–0.08 in) in diameter, stiff, slightly curved, and ending in a sharp point. The leaves have 5-9 longitudinal veins, sparsely covered in silky hairs and often twisted where they join the branch. The flat leaves are thick and concave with 5 prominent longitudinal veins. The dark or pale pink racemes of 18-20 scented flowers are borne in leaf axils on smooth short pink stalks. The perianth is bright pink and the pistil 6.5–8 mm (0.3–0.3 in) long. Flowering occurs from September to October and the fruit are either oblong or egg-shaped about 2 cm (0.8 in) long and 1.5 cm (0.6 in) wide and form in small clusters. The surface is mostly smooth with occasional small blister-like protuberances, ending with a small thin beak. [3] [4] [5] [6]
Hakea rigida was first formally described in 1999 by Laurence Haegi and the description was published in Flora of Australia . Haegi kept the name that Charles Austin Gardner had used to label specimens stored in the Western Australian Herbarium. The specific epithet (rigidus) is believed to be from the Latin rigidus meaning "rigid" referring to the leaves. [7] [8] [9]
Hakea rigida is an uncommon species growing from Beacon, Bonnie Rock, Westonia the Yilgarn north of Southern Cross. Recorded only from a few specimens, occurring in mallee-shrubland, open sand plains to gravelly soils. [4] [5]
Hakea rigida is classified as "Priority Two" by the Government of Western Australia Department of Parks and Wildlife, meaning that it is rare or threatened due to it being known from one to five populations. [3] [4] [10]
Hakea petiolaris, commonly known as the sea-urchin hakea, is a shrub or small tree with cream-coloured and pink or purple flowers and woody fruit. It is endemic to the south west of Australia, occurring at the coastal plain, jarrah forest and wheatbelt regions, often at the ancient granite outcrops of Western Australia.
Hakea scoparia is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia where it grows in shrubland. It is a shrub with ascending branches, terete leaves and clusters of cream to pinkish flowers in leaf axils from June to September.
Hakea cygna, commonly known as the swan hakea, is a species of flowering plant in the family Proteaceae. It usually grows as a dense shrub with creamy-white upright flowers appearing from July to August. It is endemic to Western Australia.
Hakea cycloptera, commonly known as elm-seed hakea, is a shrub in the family Proteaceae endemic to South Australia. It is a small spreading shrub with an abundance of pale pink or white flowers from December to August.
Hakea dohertyi, commonly known as the Kowmung hakea, is a shrub endemic to a restricted locale in the Great Dividing Range in central New South Wales in Australia.
Hakea trineura is a flowering plant in the family Proteaceae and is endemic to Queensland. The branches and leaves are covered with rusty hairs and the pendulous flowers are greenish-yellow.
Hakea cucullata, commonly known as hood-leaved hakea, cup hakea or scallop hakea, is a species of shrub in the family Proteaceae and is endemic to the south-west of Western Australia. It is an attractive shrub with distinctive foliage and beautiful large pink, red, or deep purple scented flowers.
Hakea acuminata is a shrub of the family Proteaceae native to Western Australia. A restricted species bearing clusters of white flowers with a green or pinkish tinge in late autumn to winter.
Hakea ambigua is a shrub in the family Proteaceae. In favourable conditions may grow into an attractive weeping shrub with creamy white flowers. Only found in the Stirling Ranges of southern Western Australia.
Hakea anadenia is a shrub in the family Proteaceae, native to near the west coast of Western Australia. The fragrant creamy-white flowers appear in profusion from late winter to spring, but do not produce nectar.
Hakea brownii commonly known fan-leaf hakea is a shrub in the family Proteaceae native to an area in the Wheatbelt region of Western Australia. This species shares a common name with Hakea baxteri due to its distinctive leaves.
Hakea candolleana is a shrub in the family Proteaceae native to areas along the west coast in the Wheatbelt and Mid West regions of Western Australia. A cream-white winter flowering species, useful as a garden ground cover.
Hakea costata, commonly known as the ribbed hakea, is a shrub in the family Proteaceae native to Western Australia. A multi-stemmed small shrub producing attractive pink or white brush-like blooms rich in nectar from July to October.
Hakea elliptica, commonly known as the oval-leaf hakea, is a species of flowering plant in the family Proteaceae. It is a shrub endemic to Western Australia. A fast growing adaptable species with ornamental wavy leaves, golden bronze new growth and an abundance of showy white flowers. A good wildlife habitat due to its dense form with foliage to ground level.
Hakea erecta is a shrub in the family Proteaceae and is endemic to Western Australia. It is a dense rounded shrub with linear twisted leaves and up to 24 pink or white fragrant flowers appearing in leaf axils in spring.
Hakea hastata is a shrub in the family Proteaceae and is endemic to southern Western Australia. It is an open, upright shrub with light green leaves, branches covered in dense hairs and white flowers in spring.
Hakea tuberculata is a flowering plant in the family Proteaceae and is endemic to several isolated areas along the coast in the Peel, South West, Great Southern and Goldfields-Esperance regions of Western Australia. It is an upright shrub with white flowers and rigid, prickly leaves.
Hakea multilineata, commonly known as grass-leaved hakea, is a shrub in the family Proteaceae. It is endemic to an area in the Wheatbelt and Goldfields-Esperance regions of Western Australia. It has pink to red long racemes in upper leaf axils and leathery linear leaves.
Hakea pendens is a flowering plant in the family Proteaceae and endemic to a small area in the Goldfields-Esperance regions of Western Australia. It is a small shrub with needle-like leaves and pendulous pink flowers.
Hakea psilorrhyncha is a flowering plant in the family Proteaceae, it is endemic to a small area on the west coast in the Wheatbelt and Mid West regions of Western Australia. It has needle-shaped, sharply pointed leaves and clusters of scented brownish yellow flowers.
