''Cyanothamnus yarrowmerensis'' is a species of erect, woody shrub that is

endemic Endemism is the state of a species being found only 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 foun ...

to Queensland. It has

pinnate Pinnation (also called pennation) is the arrangement of feather-like or multi-divided features arising from both sides of a common axis. Pinnation occurs in biological morphology, in crystals, such as some forms of ice or metal crystals, and ...

bipinnate The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets ...

leaves and groups of up to seven flowers with white petals in leaf

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

Description

''Cyanothamnus yarrowmerensis'' is an erect, woody shrub that typically grows to a height of about . It has pinnate or bipinnate leaves long and wide with between three and seven leaflets on a

petiole Petiole may refer to: *Petiole (botany), the stalk of a leaf, attaching the blade to the stem *Petiole (insect anatomy) In entomology, petiole is the technical term for the narrow waist of some hymenopteran insects, especially ants, bees, and ...

long. The end leaflet is linear, long and about wide and the side leaflets are similar but longer. The flowers are white and are arranged in groups of up to seven in leaf

s on a peduncle 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 Etymology The term ''sepalum'' ...

s are circular, about long and wide and the

petal Petals are modified leaves that form an inner whorl surrounding the reproductive parts of flowers. They are often brightly coloured or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''corol ...

s are long. The

stamen The stamen (: stamina or stamens) is a part consisting of the male reproductive organs of a flower. Collectively, the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filament ...

s and the

style Style, or styles may refer to: Film and television * ''Style'' (2001 film), a Hindi film starring Sharman Joshi, Riya Sen, Sahil Khan and Shilpi Mudgal * ''Style'' (2002 film), a Tamil drama film * ''Style'' (2004 film), a Burmese film * '' ...

are hairy and the stigma is minute, scarcely wider than the style. Flowering has been observed in October and the fruit is a

glabrous Glabrousness () 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 a plant or animal, or be due to loss because of a physical condition, ...

capsule about long and wide.

Taxonomy and naming

This species was first formally described in 2003 by Marco F. Duretto and given the name ''Boronia yarrowmerensis'' in the journal '' Muelleria'' from a specimen collected north of Yarrowmere Station homestead. In a 2013 paper in the journal ''

Taxon In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and ...

'', Marco Duretto and others changed the name to ''Cyanothamnus yarrowmerensis'' on the basis of

cladistic analysis Cladistics ( ; from Ancient Greek 'branch') is an approach to biological classification in which organisms are categorized in groups ("clades") based on hypotheses of most recent common ancestry. The evidence for hypothesized relationships is ...

. The

specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...

(''yarrowmerensis'') refers to type location.

Distribution and habitat

''Cyanothamnus yarrowmerensis'' is only known from the type location in

North Queensland North Queensland or the Northern Region is the northern part of the Australian state of Queensland that lies just south of Far North Queensland. Queensland is a massive state, larger than many countries, and its Tropical North Queensland, trop ...

where it grows in ''

Eucalyptus ''Eucalyptus'' () is a genus of more than 700 species of flowering plants in the family Myrtaceae. Most species of ''Eucalyptus'' are trees, often Mallee (habit), mallees, and a few are shrubs. Along with several other genera in the tribe Eucalyp ...

'' forest or woodland on sandy soil .

Conservation

''Cyanothamnus yarrowmerensis'' (as ''Boronia yarrowmerensisis'') is listed as of "least concern" by the Queensland Government Department of Environment and Science.

References

{{Taxonbar, from=Q106902293 yarrowmerensis Flora of Queensland Plants described in 2003 Taxa named by Marco Duretto