Sinosenecio yangii D. G. Zhang & Q. Zhou, 2022

Peng, Jing-Yi, Zhang, Dai-Gui, Deng, Tao, Huang, Xian-Han, Chen, Jun-Tong, Meng, Ying, Wang, Yi & Zhou, Qiang, 2022, Sinosenecio yangii (Asteraceae), a new species from Guizhou, China, PhytoKeys 210, pp. 1-13 : 1

Sinosenecio yangii D. G. Zhang & Q. Zhou sp. nov.

Figs 4 , 5

Type.

China. Guizhou: Libo County, Lihua Town , 25°36'53"N, 108°12'63"E, on rock cliff by the side of a rural road, elev. 347 m, 16 March 2021, D. G. Zhang & T. Deng 14231. (holotype: JIU!; isotype: JIU!) .

Description.

Scapigerous herbs. Rhizomes short and stout with many fibrous roots. Stems slender, scapiform, erect or declining, solitary or several, 13-22 cm long, basally reddish-brown and sparsely white villous, almost smooth in upper part. Radical leaves several; petiole ca. 3-6.5 cm long, densely villous or glabrescent, basally expanded, not auriculate; lamina suborbicular or reniform, ca. 2.5-4.5 × 2.5-6.5 cm, base cordate, margin irregularly triangular dentate, shallowly undulate or entire, apex slightly acute; adaxially green, densely or sparsely pubescent, abaxially pale green or purplish red, sparsely arachnoid or nearly glabrous. Upper leaves 1 or 2, bract-like, shortly petiolate, lanceolate. Capitula usually 1-3, peduncles slender, ca. 2-3.5 cm long, with a basal linear bracteole, or with 1-2 small linear bracteoles in the upper part. Involucres campanulate, calyculate with 2-3 bracteoles or more; phyllaries ca. 13, lanceolate, ca. 6 mm long, with ciliate margin, apically acute or obtuse and sometimes purplish. Ray florets ca. 13, corolla tube 3 mm long, glabrous; ray yellow, oblong, ca. 12 mm long, 4-veined, apically 3-denticulate. Disc florets numerous; corolla yellow, 4 mm, with ca. 1.5 mm glabrous tube and 0.85 mm limb. Anthers oblong, 5, ca. 1.2 mm long, basally obtuse. Style branches ca. 0.5 mm long, puberulent. Achenes ca. 1 mm long, smooth and glabrous. Pappus absent.

Phenology.

Flowering from March to May, fruiting from April to June.

Etymology.

The species was named after Professor Qin-er Yang, an expert in the field of Asteraceae at the Chinese Academy of Sciences. The Chinese name is given as “亲二蒲儿根” (qīn èr pú ér gēn).

Distribution and habitat.

Sinosenecio yangii is known from Lihua Town, Libo County, Guizhou Province, China (Fig. 6 ). It was collected from a rock cliff by the side of a rural road in this town, at an altitude of 347 m.

Figures

Figure 4. Holotype sheet of Sinosenecio yangii D. G. Zhang & Q. Zhou.

Figure 5. Sinosenecio yangii A habit B capitulum C ray floret D disk floret E phyllary F stamens G style (drawing by Chu-miao Xie).

Figure 6. Distribution of Sinosenecio yangii.