''Acradenia'' is a genus of two species of tree or shrub in the family

Rutaceae The Rutaceae is a family, commonly known as the rueRUTACEAE
in BoDD – Botanical Derm ...

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 Australia. These plants have leaves that are

trifoliate The following is a list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (a single leaf blade or lamina) or compound (with several leaflets). The edge of the leaf may be regular o ...

, arranged in opposite pairs and flowers that have five

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

s, five

petal Petals are modified Leaf, leaves that surround the reproductive parts of flowers. They are often advertising coloration, brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''c ...

s and usually ten

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

s of unequal lengths.

Description

Plants in the genus ''Acradenia'' are evergreen trees, sometimes shrubs with trifoliate leaves arranged in opposite pairs and lacking

domatia A domatium (plural: domatia, from the Latin "domus", meaning home) is a tiny chamber that houses arthropods, produced by a plant. Ideally domatia differ from galls in that they are produced by the plant rather than being induced by their inhabi ...

. The flowers are arranged in

panicle A panicle is a much-branched inflorescence. (softcover ). Some authors distinguish it from a compound spike inflorescence, by requiring that the flowers (and fruit) be pedicellate (having a single stem per flower). The branches of a panicle are of ...

s in leaf

axil A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...

s or on the ends of branchlets. The flowers are

bisexual Bisexuality is a romantic or sexual attraction or behavior toward both males and females, or to more than one gender. It may also be defined to include romantic or sexual attraction to people regardless of their sex or gender identity, whi ...

usually with five (rarely six) sepals and petals. The sepals are long, joined at the base and remain attached to the fruit. The petals overlap at the base and there are twice as many stamens as petals, usually alternating in length. There are usually five

carpel 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'' ...

s in each

ovary The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the body. ...

and two

ovule In seed plants, the ovule is the structure that gives rise to and contains the female reproductive cells. It consists of three parts: the ''integument'', forming its outer layer, the ''nucellus'' (or remnant of the megasporangium), and the fe ...

s in each

locule A locule (plural locules) or loculus (plural loculi) (meaning "little place" in Latin) is a small cavity or compartment within an organ or part of an organism (animal, plant, or fungus). In angiosperms (flowering plants), the term ''locule'' usu ...

. The fruit has up to five follicles joined at the base, each follicle with a single, smooth brown seed about long.

Taxonomy

The genus ''Acradenia'' was first formally described in 1853 by

Richard Kippist Richard Kippist (1812–1882) was an English botanist and librarian. Life Kippist was born in Stoke Newington, London, on 11 June 1812. He worked as a clerk in the office of Joseph Woods, F.L.S., architect, with whom he shared an interest in b ...

in the ''

Proceedings of the Linnean Society of London The Linnean Society of London is a learned society dedicated to the study and dissemination of information concerning natural history, evolution, and taxonomy. It possesses several important biological specimen, manuscript and literature colle ...

'' and the first species described was '' A. frankliniae''. The closest relative to ''Acradenia'' is '' Crossosperma'' from

New Caledonia ) , anthem = "" , image_map = New Caledonia on the globe (small islands magnified) (Polynesia centered).svg , map_alt = Location of New Caledonia , map_caption = Location of New Caledonia , mapsize = 290px , subdivision_type = Sovereign st ...

Species

*''

Acradenia euodiiformis ''Acradenia euodiiformis'', commonly known as yellow satinheart or bonewood, is a species of tree that is endemic to eastern Australia. It has mostly trifoliate leaves, the leaflets narrow elliptic to lance-shaped, with prominent oil glands, an ...

'' (F.Muell.) T.G.Hartley - yellow satinheart, bonewood (N.S.W., Qld.) *'' Acradenia frankliniae'' Milligan ex Kippist - whitey wood, wirewood (Tas.).

References

External links

* {{Taxonbar, from=Q2711264 Zanthoxyloideae genera Sapindales of Australia Taxa named by Richard Kippist