 |
| Primula daguanensis W.B.Ju, B.Xu & J.Ru, in Ru, Cheng, Xu, Guo et Ju, 2026. |
Abstract
Primula daguanensis W.B.Ju, B.Xu & J.Ru is described and illustrated as a new species from Daguan County, Yunnan Province, China. It is assigned to the Primula sect. Petiolares subsect. Davidii based on its conspicuous bud scales, which are membranous and persistent at anthesis, and its coriaceous, efarinose leaves. Molecular phylogenetic analysis based on the nuclear ribosomal internal transcribed spacer (nrITS) shows it to be closely related to P. tridentifera of subsect. Petiolares, and morphological comparisons support its recognition as a distinct new species. It resembles P. epilosa, P. tridentifera, and P. bergenioides but can be distinguished by the following characters: petiole 1.0–4.5 cm long; leaves efarinose and obovate to oblanceolate, with undulate-dentate margins; abaxial reticulate veins inconspicuous, lateral veins 5–7 pairs; calyx parted to one-third, with broadly triangular lobes; and corolla lobes truncate at the apex, dentate, and bearing an annulus. P. daguanensis is currently known only from the collection locality, and its conservation status is assessed as Data Deficient (DD) according to the IUCN Red List Categories and Criteria.
Key words: New species, phylogeny, Primula daguanensis, taxonomy
 |
| Primula daguanensis sp. nov. A. Plant. B. Scales. C. Leaves. D. Bract. E. Top view of the flower. F. Pin flowers (left) and thrum flower (right). G. Calyx of thrum flower. Drawn by Dr. Zhen-long Liang. |
 |
| Primula daguanensis sp. nov. A. Plant. B. Rhizome. C, D. Scales. E. Leaves. F. Abaxial leaf surface showing glandular hairs on the midrib. G. Bract. H. Pin flowers. I. Thrum flower. Photographed by W.B.Ju. |
Primula daguanensis W.B.Ju, B.Xu & J.Ru, sp. nov.
Diagnosis. Primula daguanensis is morphologically similar to P. epilosa, P. tridentifera, and P. bergenioides in having a stout rhizome, membranous bud scales persistent at thesis, and a similar leaf outline (Fig. 3), but differs by a combination of characters: leaves efarinose, with undulate-dentate margins; adaxial surface smooth; abaxial reticulate veins inconspicuous; lateral veins 5–7 pairs; petiole 1.0–4.5 cm long; calyx parted to one-third of its length, with broadly triangular lobes; corolla bears an annulus, with lobes truncate at apex and dentate.
 |
| Habitat of Primula daguanensis sp. nov. (A–D). Photographed by W.B.Ju. |
Jian Ru, Xin-Yu Cheng, Bo Xu, Lian-Jin Guo and Wen-Bin Ju. 2026. Primula daguanensis (Primulaceae), A New Species from Yunnan, China. PhytoKeys. 270: 223-233. DOI: doi.org/10.3897/phytokeys.270.171019 [03 Feb 2026]