Homostylium argyropholium var. niveum (Y. Ling) Z. X. Fu, 2025

Chen, Xinyu & Fu, Zhixi, 2025, Resurrection of the genus Homostylium Nees for the former Aster ser. Albescentes Y. Ling (Astereae, Asteraceae), with an updated generic synopsis, PhytoKeys 259, pp. 27-66 : 27-66

publication ID	https://doi.org/10.3897/phytokeys.259.155606
DOI	https://doi.org/10.5281/zenodo.15683987
persistent identifier	https://treatment.plazi.org/id/8CD50D5B-63D7-5C11-A1D8-BF2E08529FFF
treatment provided by	PhytoKeys by Pensoft
scientific name	Homostylium argyropholium var. niveum (Y. Ling) Z. X. Fu
status	comb. nov.

Treatment

2.2. Homostylium argyropholium var. niveum (Y. Ling) Z. X. Fu comb. nov.

≡ Aster argyropholis var. niveus Y. Ling View in CoL , Fl. Reipubl. Popularis Sin. 74: 358. 1985. ≡ Sinosidus argyropholis (Hand. - Mazz.) G. L. Nesom View in CoL , Phytoneuron 2020-64: 13. 2020. Type: China, Sichuan, Lixian, alt. 2700 m, 8 July 1930, F. T. Wang 21626 (holotype, PE 00275069!) (Suppl. material 1: fig. S 26).

Type.

China • Sichuan, Lixian , alt. 2700 m, 8 July 1930, F. T. Wang 21626 (holotype, PE 00275069 !) (Suppl. material 1: fig. S 26) .

Diagnosis.

Leaves abaxially densely white tomentum, secondary veins abaxially not prominent, apex obtuse or rounded. Peduncles densely white tomentum. Involucres 4–5 mm. Phyllaries 4 - seriate. The leaves’ coloration could distinctly differentiate it from the other varieties.

Distribution.

China, W Sichuan (Jinchuan, Luding, Lixian, Barkam, Maoxian, Yanyuan), and NW Yunnan (Lijiang).

Habitat.

Subalpine.

Etymology.

The varietal name “ niveum ” is derived from the Latin “ nix ”, meaning “ snow ”, combined with the neuter suffix “ - eum ”. The name likely refers to its abaxial leaf and inflorescence peduncles densely covered in white tomentum.

Specimens examined.

China • Sichuan: Jinchuan, X. Li 77625 (PE); Luding, Anonymous 6828 (PE 01824233, CDBI 0141863, CDBI 0141864, CDBI 0141865); Barkam, P. X. Li 10061 (PE); Maoxian & Lixian, C. Ho & Z. L. Zhou 13058 (PE); Lixian, F. T. Wang 21626 (PE 00275069); • Yunnan: Lijiang, W. L. He & C. Y. Zhao 20344 (PE, KUN), R. C. Ching 20344 (KUN).