Homostylium albescens var. pilosum Z. X. Fu 2025, comb. nov.

1.9.Homostylium albescens var. pilosum(Hand. - Mazz.) Z. X. Fu comb. nov. ≡ Aster albescens var. pilosus Hand. - Mazz., Acta Horti Gothob. 12: 207. 1938. ≡ Sinosidus albescens var. pilosus (Hand. - Mazz.) G. L. Nesom, Phytoneuron 2020-64: 13. 2020. Type: China, Yunnan, Lijiang, Ninglang and Yongsheng, 15 May 1922. J. F. Rock 5164 (holotype, WU, not seen; isotypes, E 00385623!, WU 1937-0004375!) (Suppl. material 1: figs S 18, S 19). Type. China • Yunnan, Lijiang, Ninglang and Yongsheng, 15 May 1922, J. F. Rock 5164 (holotype, WU, not seen; isotypes, E 00385623!, WU 1937-0004375!) (Suppl. material 1: figs S 18, S 19). Diagnosis. Leaves oblong-lanceolate, 4–9 × 1–2 cm, abaxially on midvein or totally white pilose, adaxially sparsely hispidulous, flat. Phyllaries outer sparsely hairy. achenes densely pilose. The main differences from type variety include leaves oblong-lanceolate, abaxially sparsely pilose along the midvein or entirely, adaxially sparsely hispid, achenes densely villous. Distribution. Common. SW China (W Sichuan, E Xizang, NW Yunnan). 2800–4000 m. Habitat. Subalpine. Etymology. The varietal name “ pilosum ” is derived from the Latin “ pilus ”, meaning “ hair ”, combined with the neuter suffix “ - osum ”, meaning “ full of ” or “ abundant in ”. The name likely refers to abundant pilose on the abaxial surface of leaves. Specimens examined. China • Sichuan: Dege, Anonymous 115 (PE); Daocheng, Bot. Exped. 2436 (PE); Kangding, H. Smith 10436 (PE), 12912 (PE), 13990 (PE); Jinchuan, X. Li 78185 (PE); Lixian, S. Jiang et al. 1608 (PE); Precise locality unknown, S. Jiang et al. 2018 (PE); • Xizang: Nyingchi, Xizang Med. Herb Exped. 3450 (PE), D. E. Boufford et al. 30173 (PE), Y. T. Zhang & K. Y. Lang 1315 (PE 00274876, PE 00274877), B. S. Li et al. 6247 (PE); Mainling, Qinghai-Tibet Exped. 1961 (PE 00274878, PE 00274879), Xizang Med. Herb Exped. 3724 (PE), Qinghai-Tibet Supplement Team 750817 (PE 00274874, PE 00274875); Precise locality unknown, B. S. Li & S. Z. Cheng 5376 (PE 01824815, PE 01824816); • Yunnan: Dali, R. C. Ching 22919 (PE), Qin et al. 649 (PE); Qiaojia, B. X. Sun et al. 908 (PE); Lijiang, J. F. Rock 5164 (E 00385623, WU 1937-0004375).