Dwarf boronia | |
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Cyanothamnus nanus var. hyssopifolius in Morton National Park | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Sapindales |
Family: | Rutaceae |
Genus: | Cyanothamnus |
Species: | C. nanus |
Binomial name | |
Cyanothamnus nanus | |
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Occurrence data from Australasian Virtual Herbarium | |
Synonyms [1] | |
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Cyanothamnus nanus, commonly known as the dwarf boronia or small boronia [2] is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is a prostrate or low spreading shrub with simple or three-part leaves and white or pale pink four-petalled flowers.
Cyanothamnus nanus is a prostrate shrub or one that has weak, spreading branches and grows to about 25 cm (10 in) wide and 50 cm (20 in) high. Its youngest branches have a few soft hairs but become glabrous as they age. The leaves are simple or trifoliate on a petiole up to 5 mm (0.2 in) long. The leaves or leaflets are linear to elliptic or egg-shaped, 2–15 mm (0.08–0.6 in) long and 0.5–3.5 mm (0.02–0.1 in) wide. The flowers are white to pale pink and are arranged singly or in groups of up to three or more in leaf axils, the groups on a peduncle 1–7 mm (0.04–0.3 in) long, individual flowers on a pedicel 2–16 mm (0.08–0.6 in). The four sepals are triangular to broadly egg-shaped, 1–3.5 mm (0.04–0.1 in) long and 0.5–1.5 mm (0.02–0.06 in) wide, overlapping at their bases. The four petals are 3–5.5 mm (0.1–0.2 in) long, 1.2–3 mm (0.05–0.1 in) wide and overlap at their bases. The stamens are covered with long, soft hairs. Flowering occurs from October to February. [2] [3] [4]
Dwarf boronia was first formally described in 1840 by William Jackson Hooker who gave it the name Boronia nana in Icones Plantarum from a specimen collected by Ronald Campbell Gunn on top of Rocky Cape. [5] [6] In a 2013 paper in the journal Taxon , Marco Duretto and others changed the name to Cyanothamnus nanus on the basis of cladistic analysis. [7]
The names of three varieties have been accepted by Plants of the World Online:
Boronia muelleri, commonly known as the forest boronia or pink boronia, is a flowering plant that occurs in forest, woodland and heath in Victoria and New South Wales in Australia. It is an erect, woody shrub or small tree with pinnate leaves and up to fifteen pink to white four-petalled flowers arranged in leaf axils in spring and summer.
Boronia algida, commonly known as alpine boronia, is a flowering plant in the citrus family, Rutaceae and is endemic to south-eastern Australia. It is an erect shrub with many branches, pinnate leaves and white to bright pink, four-petalled flowers usually borne singly on the ends of branches.
Cyanothamnus anemonifolius, commonly known as narrow-leaved boronia or sticky boronia, is a flowering plant that is endemic to south-eastern Australia. It is a shrub with mostly pinnate leaves, with white to pale pink four-petalled flowers in leaf axils.
Cyanothamnus is a genus of flowering plant in the family Rutaceae, native to Australia. Plants in the genus Cyanothamnus are erect or spreading shrubs usually with pinnate leaves arranged in opposite pairs, the leaves or leaflets flat. The flowers are arranged singly or in cymes with minute bracts. The petals are usually pink or white, sometimes blue or yellowish-green.
Cyanothamnus quadrangulus, commonly known as narrow-leaved boronia, is a plant in the citrus family, Rutaceae and is endemic to eastern Australia. It is an erect shrub with four-angled branches, bipinnate leaves and white, sometimes pale pink, four-petalled flowers.
Cyanothamnus baeckeaceus is a plant in the citrus family, Rutaceae and is endemic to eastern Australia. It is a slender or straggling shrub with simple or trifoliate leaves and pink and white four-petalled flowers. It is endemic to the south-west of Western Australia.
Cyanothamnus bipinnatus, commonly known as rock boronia, is a plant in the citrus family, Rutaceae and is endemic to Queensland. It is an erect shrub with bipinnate or tripinnate leaves and white, four-petalled flowers. A more widespread species previously known as Boronia pinnata and also occurring in New South Wales is now considered to be B. occidentalis.
Cyanothamnus coerulescens, commonly known as blue boronia, is a plant in the citrus family, Rutaceae and is endemic to southern Australia. It is a small, spindly shrub with glandular stems, small, more or less cylindrical leaves and blue to pinkish mauve, four-petalled flowers. There are two subspecies endemic to Western Australia and a third that also occurs in three eastern states.
Boronia filifolia, commonly known as the slender boronia, is a plant in the citrus family Rutaceae and is endemic to south-eastern Australia. It is a slender shrub with simple or pinnate leaves and pale to deep pink four-petalled flowers.
Cyanothamnus occidentalis, commonly known as the rock boronia, is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is an erect, woody shrub with pinnate or bipinnate leaves and groups of up to three white to pale pink, pink four-petalled flowers arranged in leaf axils.
Boronia pilosa, commonly known as the hairy boronia, is a plant in the citrus family Rutaceae and is endemic to south-eastern Australia. It is an erect, woody shrub with hairy branches, pinnate, sometimes hairy leaves and groups of up to ten white to pink, four petalled flowers.
Cyanothamnus rigenss, commonly known as the stiff boronia, is a plant in the citrus family Rutaceae and is endemic to south-eastern New South Wales in Australia. It is a low, compact shrub with mostly trifoliate, glandular leaves and white to pale pink, four-petalled flowers in the leaf axils.
Cyanothamnus inflexus is a plant in the citrus family Rutaceae and is endemic to tablelands near the New South Wales - Queensland border in Australia. It is an erect, woody shrub with pinnate leaves and up to seven white to pink four-petalled flowers in the leaf axils. Boronia bipinnata is similar but has larger, bipinnate or tripinnate leaves and smaller sepals and petals.
Cyanothamnus montimulliganensis is a plant in the citrus family Rutaceae and is endemic to a single mountain in Queensland. It is an erect, woody shrub with pinnate or bipinnate leaves and white, four-petalled flowers usually arranged singly in leaf axils.
Boronia parviflora, commonly known as the swamp boronia, small boronia, tiny boronia, or small-flowered boronia, is a plant in the citrus family Rutaceae and is endemic south-eastern Australia. It is a weak, low shrub with elliptic to egg-shaped leaves with finely toothed edges and up to three pink, white or green four-petalled flowers arranged at or near the ends of the stems.
Cyanothamnus polygalifolius, commonly known as dwarf boronia, milkwort-leaved boronia or milkwort boronia, is a plant in the citrus family Rutaceae and is endemic to eastern Australia. It is a low-lying shrub with simple leaves and white or pink flowers arranged singly or in groups of up to three in leaf axils.
Boronia ruppii, commonly known as Rupp's boronia, is a species of plant in the citrus family Rutaceae and is endemic to a small area in New South Wales. It is a shrub with hairy branches, simple and trifoliate leaves and pink, four-petalled flowers in the leaf axils. It only grows around the abandoned Woodsreef asbestos mine.
Cyanothamnus warangensis is a species of erect, woody shrub that is endemic to Queensland. It has bipinnate leaves and groups of between five and twenty-five or more white flowers in leaf axils.
Cyanothamnus westringioides is a species of erect shrub that is endemic to a small area in the southwest of Western Australia. It has simple, narrow, sessile leaves and pale pink flowers arranged singly in leaf axils.