''Daviesia divaricata'', commonly known as marno,
[ is a species of flowering plant in the family 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 of Western Australia. It is a low, spreading or erect and bushy shrub with phyllode
Phyllodes are modified petioles or leaf stems, which are leaf-like in appearance and function. In some plants, these become flattened and widened, while the leaf itself becomes reduced or vanishes altogether. Thus the phyllode comes to serve the ...
s reduced to small, triangular scales, and orange and maroon flowers.
Description
''Daviesia divaricata'' is a low, spreading or erect and bushy shrub that typically grows to a height of and is mostly glabrous
Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part of ...
. Its phyllodes are reduced to keeled, triangular scales about long. The flowers are arranged in groups of up to six in leaf axils on a peduncle long, the rachis
In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft".
In zoology and microbiology
In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this c ...
up to , each flower on a 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
...
long with bract
In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...
s about long. The 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 are long and have five ribs, the lobes varying with subspecies. The standard Standard may refer to:
Symbols
* Colours, standards and guidons, kinds of military signs
* Standard (emblem), a type of a large symbol or emblem used for identification
Norms, conventions or requirements
* Standard (metrology), an object th ...
petal is egg-shaped, long, wide and deep orange with a maroon base and a deeply notched tip. The wings
A wing is a type of fin that produces lift while moving through air or some other fluid. Accordingly, wings have streamlined cross-sections that are subject to aerodynamic forces and act as airfoils. A wing's aerodynamic efficiency is expresse ...
are long and maroon, and the keel
The keel is the bottom-most longitudinal structural element on a vessel. On some sailboats, it may have a hydrodynamic and counterbalancing purpose, as well. As the laying down of the keel is the initial step in the construction of a ship, in Br ...
is long and maroon. Flowering occurs from May to early November and the fruit is a triangular pod long.
Taxonomy
''Daviesia divaricata'' was first formally described in 1837 by botanist George Bentham
George Bentham (22 September 1800 – 10 September 1884) was an English botanist, described by the weed botanist Duane Isely as "the premier systematic botanist of the nineteenth century". Born into a distinguished family, he initially studi ...
in Stephan Endlicher
Stephan Ladislaus Endlicher also known as Endlicher István László (24 June 1804, Bratislava (Pozsony) – 28 March 1849, Vienna) was an Austrian botanist, numismatist and Sinologist. He was a director of the Botanical Garden of Vienna.
Bio ...
's ''''.specific epithet
In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...
(''divaricata'') means "widely spreading".Michael Crisp
Michael Douglas Crisp (born 1950) is an emeritus professor in the Research School of Biology at the Australian National University located in Canberra. In 1976 he gained a PhD from the University of Adelaide, studying long-term vegetation chan ...
and Gregory T. Chandler described two subspecies in ''Phytotaxa
''Phytotaxa'' is a peer-reviewed scientific journal for rapid publication on any aspect of systematic botany. It publishes on a wide range of subjects, but focuses on new species, monographs, floras, revisions, reviews, and typification issues. ...
'', and the names are accepted by the Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Syst ...
:
* ''Daviesia divaricata'' Benth. subsp. ''divaricata''
Distribution and habitat
Marno grows on sand, over both limestone and laterite in near-coastal sandplains and dunes from near the Hutt River to near Busselton
Busselton is a city in the South West region of the state of Western Australia approximately south-west of Perth. Busselton has a long history as a popular holiday destination for Western Australians; however, the closure of the Busselton ...
. Subspecies ''lanulosa'' replaces the autonym
Autonym may refer to:
* Autonym, the name used by a person to refer to themselves or their language; see Exonym and endonym
* Autonym (botany), an automatically created infrageneric or infraspecific name
See also
* Nominotypical subspecies, in zo ...
in the north and occurs from near Walkaway to the Murchison River.
Conservation status
Both subspecies of ''Daviesia divaricata'' are classified as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions
The Department of Biodiversity, Conservation and Attractions (DBCA) is the Western Australian government
The Government of Western Australia, formally referred to as His Majesty's Government of Western Australia, is the Australian state de ...
.
References
{{Taxonbar, from1=Q15532301, from2=Q100451097, from3=Q42740501
divaricata
Flora of Western Australia
Taxa named by George Bentham
Plants described in 1837