Homostylium albescens var. megaphyllum (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.15683973
persistent identifier	https://treatment.plazi.org/id/0E4BE71C-B030-5C81-A59E-F014A1B52A18
treatment provided by	PhytoKeys by Pensoft
scientific name	Homostylium albescens var. megaphyllum (Y. Ling) Z. X. Fu
status	comb. nov.

Treatment

1.8. Homostylium albescens var. megaphyllum (Y. Ling) Z. X. Fu comb. nov.

≡ Aster albescens var. megaphyllus Y. Ling View in CoL , Fl. Reipubl. Popularis Sin. 74: 358, 185. 1985. ≡ Sinosidus albescens var. megaphyllus (Y. Ling) G. L. Nesom View in CoL , 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).