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.[3][4][2]
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 the Plants of the World Online:
Cyanothamnus nanus, commonly known as the dwarf boronia or small boronia 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 nana var. pubescensBoronia nana là một loài thực vật có hoa trong họ Cửu lý hương. Loài này được Hook. mô tả khoa học đầu tiên năm 1840.[1]
Boronia nana là một loài thực vật có hoa trong họ Cửu lý hương. Loài này được Hook. mô tả khoa học đầu tiên năm 1840.