三基脉紫菀(原亚种) san ji mai zi wan (yuan ya zhong)

Aster ageratoides Turczaninow subsp. trinervius (Roxburgh ex D. Don) Kitamura; A. ageratoides var. trinervius (Roxburgh ex D. Don) Handel-Mazzetti; A. scabridus C. B. Clarke; Diplopappus asperrimus (Nees) Candolle; Galatella asperrima Nees.

Stems erect, 60-205 cm tall, thick, branched, strigose. Leaves subleathery (thick), sometimes thin; blade ovate-lanceolate, abaxially strigillose or glabrate, glandular, adaxially strigose, 3-veined at base, conspicuously reticulate veined, base subrounded. Involucres 8-15 mm in diam.; phyllary apex green, sometimes tinged red. Ray florets white.

Pinus forests; ca. 3100 m. S Xizang [Bhutan, NE India, N Myanmar, Nepal, N Thailand].

Under Aster trinervius subsp. trinervius only var. trinervius occurs in China.