Nematolepis is a genus of seven species of shrubs or small trees in the family Rutaceae (order Sapindales), all endemic to Australia. The genus is characterised by stems, leaves, and sepals that are covered with distinctive shield-like scales — a feature reflected in the common names of its best-known member. Leaves are simple and arranged alternately along the stems.
Flowers are borne singly or in cymes in the leaf axils and display five partly overlapping petals alongside five sepals and ten stamens, all free from one another in most species. Each flower bears five free carpels, each carrying two ovules, with the stigma not differentiated from the style. The fruit consists of five follicles, each typically containing a single seed.
Six of the seven accepted species are found in eastern Australia, occurring across Queensland, New South Wales, Victoria, and Tasmania. One species, Nematolepis phebalioides, is confined to Western Australia. Nematolepis squamea, commonly known as satinwood, lancewood, or bobie bobie, is the most widely distributed member of the genus. Nematolepis wilsonii, endemic to Victoria, is considered extinct in the wild.
The genus was first formally described in 1852 by the Ukrainian–Russian botanist Nikolai Turczaninow, with Nematolepis phebalioides as the first described species. The Australian Plant Census recognises seven species.
Distribution
All species of Nematolepis are endemic to Australia. Six species occur in eastern Australia across Queensland, New South Wales, Victoria, and Tasmania; one species, Nematolepis phebalioides, is restricted to Western Australia. Nematolepis wilsonii is considered extinct in Victoria.
Taxonomy Notes
Nematolepis was first formally described in 1852 by Nikolai Turczaninow, published in the Bulletin de la Société Impériale des Naturalistes de Moscou, with Nematolepis phebalioides as the type species. The genus belongs to the family Rutaceae (order Sapindales). The Australian Plant Census accepted seven species as of July 2020.
