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

1.8.Homostylium albescens var. megaphyllum(Y. Ling) Z. X. Fu comb. nov. ≡ Aster albescens var. megaphyllus Y. Ling, Fl. Reipubl. Popularis Sin. 74: 358, 185. 1985. ≡ Sinosidus albescens var. megaphyllus (Y. Ling) G. L. Nesom, Phytoneuron 2020-64: 13. 2020. Type: China, Sichuan, Lixian, C. Ho & Z. L. Zhou 13318 (holotype, PE 00274858!) (Suppl. material 1: fig. S 17). Type. China • Sichuan, Lixian, C. Ho & Z. L. Zhou 13318 (holotype, PE 00274858!) (Suppl. material 1: fig. S 17). Diagnosis. Stems yellow-brown pilose and white arachnoid. Leaves elliptic or ovate-lanceolate, 10–15 × 5–7 cm, adaxially arachnoid pilose, reticulate veins prominent, abaxially sparsely pilose, midvein white villous, base rounded or broadly cuneate, margin subentire, apex acute or subrounded. Phyllaries outer ovate, sparsely puberulent. The leaf shape of this variety differs from all other varieties. Distribution. China, W Sichuan (Lixian, Maoxian, Wenchuan). Habitat. Subalpine. Etymology. The varietal name “ megaphyllum ” is derived from the Greek “ mega - ”, meaning “ large ” or “ grate ”, and the “ - phyllon ”, meaning “ leaf ”, combined with the Latin neuter suffix “ - um ”. The name likely refers to this variety having larger leaves than other varieties. Specimens examined. China • Sichuan: Lixian, C. Ho & Z. L. Zhou 13318 (PE).