''Hakea undulata'', commonly known as wavy-leaved hakea,
is a flowering plant in the family
Proteaceae
The Proteaceae form a family of flowering plants predominantly distributed in the Southern Hemisphere. The family comprises 83 genera with about 1,660 known species. Together with the Platanaceae and Nelumbonaceae, they make up the order Pro ...
and is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...
to the
south-west
The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each se ...
of Western Australia. It has stiff wavy leaves and fragrant cream-white flowers from mid-winter to October.
Description
''Hakea undulata'' is an erect and often straggly shrub, growing to between high and does not form a
lignotuber. The smaller branches are smooth by flowering. The leaves are elliptic to egg-shaped, stiff, prickly, scalloped edges, long, wide. The green-grey leaves have distinctive venation above and below and taper on long stalks to the leaf base. The single
inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...
consist of 12-21 sweetly scented cream-white flowers in a
raceme
A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...
on smooth
pedicel
Pedicle or pedicel may refer to:
Human anatomy
*Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures
...
. The
perianth
The perianth (perigonium, perigon or perigone in monocots) is the non-reproductive part of the flower, and structure that forms an envelope surrounding the sexual organs, consisting of the calyx (sepals) and the corolla (petals) or tepals when ...
is cream-white and the
pistil
Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...
long. Fruit are obliquely
ovoid
An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas (projective geometry, technical drawing, etc.) it is given a more precise definition, which may include either one or ...
long by wide with smooth slightly rough blister like protrusions on the surface ending with an upturned beak. Flowering occurs from July to October.
Taxonomy and naming
''Hakea undulata'' was first formally described by botanist Robert Brown in '' Transactions of the Linnean Society of London'' in 1810.
Distribution and habitat
Wavy-leaved hakea grows from the Darling Ranges
The Darling Scarp, also referred to as the Darling Range or Darling Ranges, is a low escarpment running north–south to the east of the Swan Coastal Plain and Perth, Western Australia. The escarpment extends generally north of Bindoon, to t ...
north of Perth
Perth is the capital and largest city of the Australian state of Western Australia. It is the fourth most populous city in Australia and Oceania, with a population of 2.1 million (80% of the state) living in Greater Perth in 2020. Perth is ...
and south to Albany. This species grows in scrubland and woodland in sand, loam and gravel or with a clay soil over laterite
Laterite is both a soil and a rock type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by ...
, sometimes on granite
Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies undergro ...
. It requires a sunny position with good drainage. A good species for hedging and wildlife habitat.
Conservation status
''Hakea undulata'' is classified as "not threatened" by the Western Australian Government.
References
{{Taxonbar, from=Q5640420
undulata
Eudicots of Western Australia
Taxa named by Robert Brown (botanist, born 1773)