Tuesday, September 14, 2021

[Botany • 2021] Primula dujiangyanensis (Primulaceae) • A New Species from Sichuan, Southwest China

Primula dujiangyanensis W.B.Ju, Bo Xu & X.F.Gao, 

in Ju, Deng, Zhu, ... et Xu, 2021.

Primula dujiangyanensis, a new species from Dujiangyan, Sichuan of China, is described and illustrated here. The new species is morphologically similar to P. kialensis and P. pengzhouensis, but it can be distinguished from the latter species by dense white hairs at roots, long stolons, smaller plants and leaves, solitary scape arising from leaf rosette, single lanceolate bract, and shorter pedicel, and it also showed different positions of anthers and styles in the corolla tube.

Keywords: Eudicots, endemic species, Primula sect. Aleuritia, taxonomy

Primula dujiangyanensis W.B.Ju, Bo Xu & X.F.Gao. 
A. Habitat; B. plant of pin flower; C. plant of thrum flower; D. pin flower; E. thrum flower.

Primula dujiangyanensis W.B.Ju, Bo Xu & X.F.Gao, sp. nov.

Diagnosis:— Primula dujiangyanensis is similar to P. kialensis Franchet (1895: 450) and P. pengzhouensis C.M.Hu, G.Hao & Y.Xu in Xu et al. (2017: 229), but it can be easily distinguished from them by the smaller plant size, stolons 3–6 cm long, roots densely white hairy, scape unitary, inflorescence with single lanceolate bract ca. 0.5–1 mm long, pedicel 3–6 mm long, and stamens of pin flower in middle of corolla tube and stamens of thrum flower at the mouth of corolla tube, the shorter style reaching middle of tube, the longer style slightly exceeding the corolla tube mouth.

Etymology:— The specific epithet refer to Dujiangyan City, the administrative name of the type locality.

Wen-Bin Ju, Heng-Ning Deng, Da-Hai Zhu, Yun-Dong Gao, Xin-Fen Gao and Bo Xu. 2021. Primula dujiangyanensis (Primulaceae) discovered from Sichuan, Southwest China. Phytotaxa. 510(3); 275–280. DOI:  10.11646/phytotaxa.510.3.7