阿尔泰蓍 a er tai shi

Achillea impatiens Linnaeus subsp. ledebourii (Heimerl) Heimerl.

Herbs, perennial, ca. 40 cm tall, with long slender rhizomes; stems erect, corymbosely branched in upper part, pilose above middle. Middle stem leaves sessile; leaf blade lanceolate, 1.5-4 × 0.5-0.9 cm, pinnatilobed to pinnatisect or pinnatipartite, both surfaces sparsely villous, rachis 1.5-3 mm wide; lobes or segments linear-lanceolate, basal ones large, margin minutely serrulate, sometimes 1-dentate on one side, apex acuminate or acute. Synflorescence a terminal, clustered, flat-topped cyme. Capitula 3-5. Involucres hemispheric, 5-6 mm in diam.; phyllaries in 3 rows, ovate or broadly elliptic, 3-5.2 × 2-3 mm, scarious margin broad, midvein deep brown, convex. Paleae brown, lanceolate-elliptic, 4-5 × ca. 1.5 mm, scarious, apex sparsely white villous. Ray florets 8; lamina white, broadly elliptic, apex 3-crenate. Disk florets white, tubular. Achenes broadly lanceolate, ca. 2 mm, with white lateral ribs. Corona absent. Fl. and fr. Jul-Sep.

Forest understories; 2200-2500 m. Xinjiang [Kazakhstan, Russia].