Boronia [section Boronia] series Persistens Duretto & Heslewood, 2023

Duretto, Marco F., Heslewood, Margaret M. & Bayly, Michael J., 2023, A molecular phylogeny of Boronia (Rutaceae): placement of enigmatic taxa and a revised infrageneric classification, Australian Systematic Botany 36 (2), pp. 81-106 : 104

Boronia [section Boronia] series Persistens Duretto & Heslewood , ser. nov.

Type: Boronia purdieana Diels.

Differs from the other series of section Boronia by have petioles that are persistent or tardily caducous and falling after the lamina has fallen ( v. absent , or deciduous with lamina).

Leaves imparipinnate; petiole persistent or tardily caducous and then after lamina has fallen. Inflorescence axillary, 1- or 2-flowered; peduncle absent or minute. Staminal filaments pilose or puberulous; anthers approximately equal or antisepalous anthers much smaller than antipetalous anthers.

A series of six species confined to south-western Australia: Boronia albiflora , B. crassifolia , B. oxyantha (two varieties), B. octandra , B. purdieana (two subspecies), and B. tetrandra .

Etymology

The series epithet is derived from the Latin persistens, alluding to the persistent petioles that remain on the branches after the leaves have fallen.