Cyanothamnus ramosus

Cyanothamnus ramosus is a slender, erect, mostly glabrous, woody shrub which grows to a height of {{convert|30|cm|in|sigfig=1|abbr=on}}. The leaves are pinnate, {{convert|10-30|mm|in|sigfig=1|abbr=on}} long and have between three and seven leaflets on a petiole {{cvt|1-11|mm}} long. The leaflets are {{cvt|5-15|mm}} long. There are up to three flowers arranged in the leaf axils on pedicels {{cvt|2-15|mm}} long. The four sepals are thick, glabrous and egg-shaped, {{convert|1.5-5|mm|in|sigfig=2|abbr=on}} long. The petals are white with blue or pale green backs, broadly elliptic, {{convert|3-5|mm|in|sigfig=2|abbr=on}} long and prominently glandular. Flowering occurs from May to October.{{cite web |last1=Duretto |first1=Marco F. |last2=Wilson |first2=Paul G. |last3=Ladiges |first3=Pauline Y. |title=Boronia ramosa |url=https://profiles.ala.org.au/opus/foa/profile/Boronia%20ramosa |publisher=Australian Biological Resources Study, Department of the Environment and Energy, Canberra |accessdate=20 April 2019}}{{FloraBase|name=Cyanothamnus ramosus|id=50120}}

This species was first formally described in 1839 by John Lindley who gave it the name Cyanothamnus ramosus and published the description in A Sketch of the Vegetation of the Swan River Colony.{{cite web|title=Cyanothamnus ramosus|url= https://id.biodiversity.org.au/instance/apni/513305|publisher=APNI|accessdate=20 April 2019}}{{cite book |last1=Lindley |first1=John |title=A Sketch of the Vegetation of the Swan River Colonly (Appendix) |date=1839 |publisher=James Ridgway |location=Piccadilly |page=xviii |url=https://www.biodiversitylibrary.org/item/29179#page/28/mode/1up |accessdate=8 May 2019}} In 1863, George Bentham changed the name to Boronia ramosa.{{cite web|title=Boronia ramosa|url= https://id.biodiversity.org.au/instance/apni/466343|publisher=APNI|accessdate=20 April 2019}} In a 2013 paper in the journal Taxon, Marco Duretto and others restored Lindley's name Cyanothamnus ramosus on the basis of cladistic analysis.{{cite journal |last1=Duretto |first1=Marco F. |last2=Heslewood |first2=Margaret M. |last3=Bayly |first3=Michael J. |title=Boronia (Rutaceae) is polyphyletic: Reinstating Cyanothamnus and the problems associated with inappropriately defined outgroups |journal=Taxon |date=2020 |volume=69 |issue=3 |pages=481–499 |doi=10.1002/tax.12242|s2cid=225836058 }} The specific epithet (ramosus) is a Latin word meaning "full of branches".{{cite book|last1=Brown|first1=Roland Wilbur|title=The Composition of Scientific Words|date=1956|publisher=Smithsonian Institution Press|location=Washington, D.C.|page =648}}

In 1971 and 1998, Paul Wilson described three subspecies in the journal Nuytsia.{{cite journal |last1=Wilson |first1=Paul G. |title=Taxonomic notes on the family Rutaceae, principally of Western Australia |journal=Nuytsia |date=1971 |volume=1 |issue=2 |page=201 |url=https://www.biodiversitylibrary.org/item/223158#page/47/mode/1up |accessdate=20 April 2019}}{{cite journal |last1=Wilson |first1=Paul G. |title=New names and new taxa in the genus Boronia (Rutaceae) from Western Australia, with notes on seed character |journal=Nuytsia |date=1998 |volume=12 |issue=1 |pages=151–152 |url=https://www.biodiversitylibrary.org/item/224909#page/157/mode/1up |accessdate=20 April 2019}} The names have subsequently been changed to reflect the change in the genus name:

• Cyanothamnus ramosus subsp. anethifolius (Bartl.) Duretto & Heslewood{{cite web |title=Cyanothamnus ramosus subsp. anethifolius |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77211064-1 |publisher=Plants of the World Online |access-date=22 September 2021}} has pedicels that are {{cvt|2-3|mm}} long and shorter than the leaves, with cylindrical leaflets that are channelled on the upper surface;
• Cyanothamnus ramosus subsp. lesueuranus (Paul G.Wilson) Duretto & Heslewood{{cite web |title=Cyanothamnus ramosus subsp. lesueuranus |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:77211066-1 |publisher=Plants of the World Online |access-date=22 September 2021}} has pedicels that are {{cvt|2-3|mm}} long and shorter than the leaves, with linear to narrow oblong leaflets that are concave on the upper surface;
• Cyanothamnus ramosus (Lindl.) Benth. subsp. ramosus (the autonym) has pedicels that are {{cvt|6-15|mm}} long and longer than the leaves.

Cyanothamnus ramosus grows on slopes and hillsides, sometimes in disused gravel pits and is widespread in the southwest from near Shark Bay to near Esperance. Subspecies anethifolius occurs between the Murchison River, the Stirling Range and Cape Le Grand, subspecies lesueuranus is only known from near Mt Lesueur and subspecies ramosus mainly from the Darling Range.

Cyanothamnus ramosus is classed as "not threatened" by the Western Australian Government Department of Parks and Wildlife, but subspecies lesueuranus is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,{{FloraBase|name=Cyanothamnus ramosus subsp. lesueuranus|id=50121}} meaning that it is poorly known and from only one or a few locations.{{cite web|title=Conservation codes for Western Australian Flora and Fauna|url=https://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/Conservation%20code%20definitions.pdf|publisher=Government of Western Australia Department of Parks and Wildlife|accessdate=22 September 2021}}

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ramosus

Category:Flora of Western Australia

Category:Plants described in 1839

Category:Taxa named by John Lindley