taxonID	type	description	language	source
5DF5DC9ED9865637AA202B9DD5F58A93.taxon	description	Figs 1, 2	en	Zhang, Ren-Bo, Deng, Tan, Liu, Ying, Xie, Da-Jun, Wei, Ruo-Xun, He, Lin, Dou, Quan-Li, Qian, Zheng-Min (2025): Sinosenecio tongziensis (Asteraceae), a new species from north Guizhou, China. PhytoKeys 252: 187-196, DOI: 10.3897/phytokeys.252.141719
5DF5DC9ED9865637AA202B9DD5F58A93.taxon	diagnosis	Diagnosis. Resembles S. changii in the subscapigerous habit, ovate-oblong and pinnately veined leaf lamina, and simple to compound terminal corymbs, but differs by membranous leaf lamina (vs. papery), 8 – 10 lateral veins (vs. 10 – 18), and stems and leaves pubescent with 2 – 5 mm long, uniseriate, spreading hairs (vs. sparsely white arachnoid to densely white tomentose) (Table 1).	en	Zhang, Ren-Bo, Deng, Tan, Liu, Ying, Xie, Da-Jun, Wei, Ruo-Xun, He, Lin, Dou, Quan-Li, Qian, Zheng-Min (2025): Sinosenecio tongziensis (Asteraceae), a new species from north Guizhou, China. PhytoKeys 252: 187-196, DOI: 10.3897/phytokeys.252.141719
5DF5DC9ED9865637AA202B9DD5F58A93.taxon	description	Description. Herbs, scapigerous. Fresh rhizomes 6 – 16 mm in diam., clad in persistent brown petiole bases. Stems 1 to 3, erect, scapiform, 15 – 40 cm tall, ribbed, villous with 2 – 5 mm long, uniseriate, spreading hairs. Leaves several, radical, rosulate, densely villous as the stems; petiole 3 – 9 cm long; blade (broadly) ovate, obovate, or ovate-oblong, 4 – 14 × 3 – 10 cm, membranous, villous, densely so along veins, pinnately veined, lateral veins 4 – 5 pairs, base cordate, margin repand with mucronulate teeth, long ciliate. Capitula 4 – 29, arranged in terminal simple to compound corymbs; peduncles 1 – 5 cm long, slender, (sparsely) pubescent, with 3 – 20 mm long, linear or linear-spatulate bracts. Involucres campanulate, 4 – 7 × 4 – 7 mm, not calyculate; phyllaries ca. 13, lanceolate, oblanceolate or subelliptic, 4 – 6 × 1 – 1.6 mm, herbaceous with membranous margins, abaxially pubescent with uniseriate, spreading hairs, apically acuminate, ciliate at the apex and on upper margin. Ray florets 10 – 13; corolla tube 2.5 – 3.5 mm long, glabrous; ray yellow, oblong, 7 – 10 × 1.2 – 2.2 mm, 4 - veined, apically 3 - denticulate. Disk florets many; corolla yellow, 4 – 6 mm long, with 2 – 3 mm tube and campanulate limb; lobes ovate-lanceolate, ca. 0.8 mm long, apically acute. Anthers oblong, ca. 1.1 mm long, base obtuse to rounded, appendages lanceolate. Styles ca. 2.5 mm long in ray florets and 4 – 4.5 mm long in disk florets, branches recurved, ca. 0.8 mm long. Achenes cylindric, 1.6 – 2.0 mm long, inconspicuously ridged, glabrous. Pappus capillary-form, uniform, white, persistent, 2.4 – 4.0 mm long.	en	Zhang, Ren-Bo, Deng, Tan, Liu, Ying, Xie, Da-Jun, Wei, Ruo-Xun, He, Lin, Dou, Quan-Li, Qian, Zheng-Min (2025): Sinosenecio tongziensis (Asteraceae), a new species from north Guizhou, China. PhytoKeys 252: 187-196, DOI: 10.3897/phytokeys.252.141719
5DF5DC9ED9865637AA202B9DD5F58A93.taxon	description	Floral micromorphological characters. The filament collar of S. tongziensis consisted of uniformly sized cells (Fig. 3 E), and the anther endothecial cell wall thickenings were polarized and radial (Fig. 3 F), lending strong support for the phylogenetic affiliation of S. tongziensis in subtribe Tephroseridinae (see below).	en	Zhang, Ren-Bo, Deng, Tan, Liu, Ying, Xie, Da-Jun, Wei, Ruo-Xun, He, Lin, Dou, Quan-Li, Qian, Zheng-Min (2025): Sinosenecio tongziensis (Asteraceae), a new species from north Guizhou, China. PhytoKeys 252: 187-196, DOI: 10.3897/phytokeys.252.141719
5DF5DC9ED9865637AA202B9DD5F58A93.taxon	etymology	Etymology. The specific epithet is derived from the type locality, Tongzi County, Guizhou Province, China.	en	Zhang, Ren-Bo, Deng, Tan, Liu, Ying, Xie, Da-Jun, Wei, Ruo-Xun, He, Lin, Dou, Quan-Li, Qian, Zheng-Min (2025): Sinosenecio tongziensis (Asteraceae), a new species from north Guizhou, China. PhytoKeys 252: 187-196, DOI: 10.3897/phytokeys.252.141719
5DF5DC9ED9865637AA202B9DD5F58A93.taxon	distribution	Distribution and ecology. The new species is endemic to Guizhou Province and is currently known only from the type locality, Xianrenshan Mountain, Tongzi County. It grows on slopes beneath the forests in karst areas at elevations of 1,200 – 1,300 m.	en	Zhang, Ren-Bo, Deng, Tan, Liu, Ying, Xie, Da-Jun, Wei, Ruo-Xun, He, Lin, Dou, Quan-Li, Qian, Zheng-Min (2025): Sinosenecio tongziensis (Asteraceae), a new species from north Guizhou, China. PhytoKeys 252: 187-196, DOI: 10.3897/phytokeys.252.141719
