Homostylium albescens var. glabratum (Diels) 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

1.3. Homostylium albescens var. glabratum (Diels) Z. X. Fu comb. nov.

≡ Aster harrowianus var. glabratus Diels , Notes Roy. Bot. Gard. Edinburgh 5: 184. 1912. ≡ Aster albescens var. glabratus (Diels) Boufford & Y. S. Chen , Harvard Pap. Bot. 14: 43. 2009. ≡ Sinosidus albescens var. glabratus (Diels) G. L. Nesom , Phytoneuron 2020-64: 13. 2020. Type: China. Yunnan, Lijiang, shady, rocky situations, side valleys on the eastern flank, Lat. 27 ' 15 ° N, alt. 9500–11000 ft, July 1906, G. Forrest 2508 (holotype, E 00385621!; isotype, P 00711686!) (Suppl. material 1: figs S 5, S 6).

= Aster albescens var. levissimus Hand. - Mazz. , Acta Horti Gothob. 12: 208. 1938. Type: China, Sichuan, Lixian, Zhuokeji (= Drogochi), alt., 3300 m, Anonymous 4544 (holotype, WU, not seen).

Type.

China • Yunnan, Lijiang , shady, rocky situations, side valleys on the eastern flank, Lat. 27 ' 15 ° N, alt. 9500–11000 ft, July 1906, G. Forrest 2508 (holotype, E 00385621 !; isotype, P 00711686 !) (Suppl. material 1: figs S 5, S 6) .

Diagnosis.

Leaves narrowly to broadly lanceolate, 5–12 cm, both surfaces glabrous, sometimes young leaves abaxially sparsely tomentose on midvein only. Phyllaries outer ovate to lanceolate, glabrous. The leaves are similar in shape to those of Homostylium albescens var. albescens , but are often shorter and narrower.

Distribution.

China (Chongqing, Gansu, Xizang, Hubei, W Sichuan, N Yunnan). 800–3000 m.

Habitat.

Subalpine.

Etymology.

The varietal name “ glabratum ” is derived from the Latin “ glaber ”, meaning “ smooth ” or “ hairless ”, combined with the neuter suffix “ - atum ”, which indicates “ possession ”. The name likely refers to the abaxially smooth, hairless leaf surface of this variety.

Specimens examined.

China • Chongqing: Chengkou, T. L. Dai 103779 (PE); Nanchuan, G. F. Li 64223 (PE), J. H. Xiong & Z. L. Zhou 92453 (PE); Wuxi, G. H. Yang 65505 (PE), • Gansu: Kangxian, Z. Y. Zhang 16874 (PE); Wenxian, Y. Q. He 936 (PE), J. X. Yang & Y. Q. He 3380 (PE); • Hubei: Xuan’en, H. J. Li 3852 (PE), 4689 (PE); Lichuan, G. X. Fu & Z. S. Zhang 1588 (PE 00274747, PE 00274748, PE 00274749); • Sichuan: Baiyu, D. E. Boufford et al. 37202 (PE); Baoxing, T. P. Soong 39045 (PE), K. L. Chu 3120 (PE); Butuo, Sichuan, Econ. Pl. Exped. 5898 (PE); Danba, D. Y. Hong et al. 95061 (PE); Ebian, Anonymous 145 (PE), Anonymous 146 (PE), Heishui, X. Li 74090 (PE), 73288 (PE), 73844 (PE), Jinchuan, X. Li 75077 (PE), 75152 (PE), 75171 (PE), 75231 (PE), 75270 (PE), 75288 (PE), 75387 (PE), 75411 (PE), 75457 (PE), 75460 (PE), 75475 (PE), 75493 (PE), 75557 (PE), 75702 (PE), 75908 (PE), 76223 (PE), 76273 (PE), 76304 (PE), 76531 (PE), 76585 (PE), 76761 (PE), 77993 (PE), 78055 (PE), 78242 (PE), 78362 (PE), 78490 (PE), 78509 (PE 00274889, PE 00274891), 78611 (PE), 78714 (PE 00274757, PE 00274758), G. Z. Zhu & X. Li 75578 (PE), 75629 (PE), 75677 (PE), 75816 (PE), G. Z. Zhu 75052 (PE), Anonymous 9474 (PE), Anonymous 75848 (PE), Kangding, W. G. Hu & X. L. Jiang 36862 (PE), X. L. Jiang 37151 (PE), 37044 (PE), 37010 (PE), C. S. Liu 1058 (PE 00274780, PE 00274797); Lixian, Anonymous 4544 (WU), C. S. Cao 21 (PE), 48 (PE), 149 (PE), 1203 (PE), Z. He & Z. L. Zhou 4216 (PE); Luhuo, Wei L. Chen et al. 7304 (PE); Barkam, X. Li 72379 (PE), 72567 (PE), 71852 (PE), 71944 (PE), X. Li & J. X. Zhou 72668 (PE), J. X. Zhou & X. Li 72729 (PE), Anonymous 23273 (PE); Meigu, Sichuan, Econ. Pl. Exped. 1677 (PE), Anonymous 13096 (PE); Mianning, S. F. Zhu 20327 (PE); Muli, K. M. Feng 2923 (PE), T. T. Yu 14100 (PE); Shimian, C. J. Xie 42771 (PE), 42413 (PE); Tianquan, X. L. Jiang 35226 (PE); Wenchuan, Anonymous 8267 (PE); Xiangcheng, Veg. Exped. 3233 (PE); Xiaojin, P. X. Li 10030 (PE), J. Zhou E 572 (PE), S. S. Chang & Y. X. Ren 6481 (PE); Yajiang, D. E. Boufford et al. 35796 (PE), West China Acad. Sci. 4116 (PE), S. X. Jia 360 (PE), H. Smith 12593 (PE), Anonymous 102001 (PE), Y. W. Tsui 5965 (PE), X. Li 76708 (PE), 76954 (PE), 76874 (PE), 76932 (PE), S. F. Zhu 20327 (PE), Anonymous 5675 (PE), Sichuan Veg. Exped. 2397 (PE); • Xizang: Zayü, C. W. Wang 66522 (PE), Jin W. Zhang 982 (PE), Chagyab, Qinghai-Tibet Exped. 12287 (PE); Markam, Qinghai-Tibet Exped. 11980 (PE 01824813, PE 01824814); Mainling, Xizang Med. Herb Exped. 4226 (PE); • Yunnan: Lijiang, G. Forrest 2508 (E 0038562, P 00711686); Shangri-la, Zhongdian Exped. 2091 (PE 00274836, PE 00274837).