Cyanothamnus. . .

Location & distribution maps

Common name:                ...

Conservation status:  ...

Etymology:   

Flowers:                  

• The flowers are arranged singly or in cymes with minute bracts

• The petals are usually pink or white, sometimes blue or yellowish-green

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Fruit:                         

Leaves:         

• Usually with pinnate leaves (simple leaves in C. anemonifolius and C. nanus) arranged in opposite pairs, the leaves or leaflets flat

Stem & branches: 

Roots:         

Habit:        

• Plants in the genus Cyanothamnus are erect or spreading shrubs

Habitat:   

Distribution:                  

• Native to Australia

Additional notes:     

• Taxonomy

  • The genus was first described in 1839 by John Lindley in A Sketch of the Vegetation of the Swan River Colony

  • Most of the species now placed in the genus were first described in the genus Boronia, with which Cyanothamnus was synonymized

  • A molecular phylogenetic study in 2020 showed that as then circumscribed Boronia was polyphyletic, and Lindley's genus was revived

  • A 2021 classification of the family Rutaceae places Cyanothamnus in the subfamily Zanthoxyloideae

• Species

  • As of September 2021, Plants of the World Online accepted the following species:

    • Cyanothamnus acanthocladus (Paul G.Wilson) Duretto & Heslewood (W.A.)

    • Cyanothamnus anemonifolius (A.Cunn.) Duretto & Heslewood – narrow-leaved boronia, sticky boronia (Qld., N.S.W., Vic., Tas.)

    • Cyanothamnus baeckeaceus (F.Muell.) Duretto & Heslewood (W.A.)

    • Cyanothamnus bipinnatus (Lindl.) Duretto & Heslewood – rock boronia (Qld.)

    • Cyanothamnus bussellianus (F.Muell.) Duretto & Heslewood (W.A.)

    • Cyanothamnus coerulescens (F.Muell.) Duretto & Heslewood – blue boronia (N.S.W., Vic., S.A., W.A.)

    • Cyanothamnus defoliatus (F.Muell.) Duretto & Heslewood (W.A.)

    • Cyanothamnus fabianoides (Diels) Duretto & Heslewood (W.A.)

    • Cyanothamnus inconspicuus (Benth.) Duretto & Heslewood (W.A.)

    • Cyanothamnus inflexus (Duretto) Duretto & Heslewood (Qld., N.S.W.)

    • Cyanothamnus montimulliganensis (Duretto) Duretto & Heslewood (Qld.)

    • Cyanothamnus nanus (Hook.) Duretto & Heslewood – dwarf boronia, small boronia (N.S.W., Vic., Tas., S.A.)

    • Cyanothamnus occidentalis (Duretto) Duretto & Heslewood – rock boronia (Qld., N.S.W.)

    • Cyanothamnus penicillatus (Benth.) Duretto & Heslewood (W.A.)

    • Cyanothamnus polygalifolius (Sm.) Duretto & Heslewood – dwarf boronia, milkwort-leaved boronia, milkwort boronia (Qld., N.S.W.)

    • Cyanothamnus quadrangulus Duretto & Heslewood – narrow-leaved boronia (Qld., N.S.W.)

    • Cyanothamnus ramosus Lindl. (W.A.)

    • Cyanothamnus rigens (Cheel) Duretto & Heslewood – stiff boronia (N.S.W.)

    • Cyanothamnus subsessilis (Benth.) Duretto & Heslewood (W.A.)

    • Cyanothamnus tenuis Lindl. – blue boronia (W.A.)

    • Cyanothamnus warangensis (Duretto) Duretto & Heslewood (Qld.)

    • Cyanothamnus westringioides (Paul G.Wilson) Duretto & Heslewood (W.A.)

    • Cyanothamnus yarrowmerensis (Duretto) Duretto & Heslewood (Qld.)

Sources of information:

• https://en.wikipedia.org/wiki/Cyanothamnus (2024)