Achillea wilsoniana (Heimerl) Hand.-Mazz.

Cite taxon page as 'WFO (2021): Achillea wilsoniana (Heimerl) Hand.-Mazz. Published on the Internet; Accessed on: 13 Jun 2021'

General Information

Herbs, perennial, with short rhizomes. Stems erect, 35-100 cm tall, densely villous above middle, glabrescent in lower part, usually corymbosely branched, with sterile branches at leaf axils in upper part. Proximal stem leaves withered by anthesis. Middle stem leaves sessile; leaf blade oblong, 4-6.5 × 1-2 cm, abaxially sparsely pilose, adaxially densely pilose, 2-pinnatisect; primary segments many, close together, elliptic-lanceolate, 5-10 × 2-4 mm; secondary segments few, lanceolate, proximal ones large, distal ones small; rachis ca. 1.5 mm wide, margin entire or dentate. Capitula many, in an apical compound corymb. Involucres broadly campanulate or hemispheric, 4-6 mm in diam.; phyllaries in 3 rows, overlapping, outer ovate-lanceolate, short, ca. 2.3 × 1.2 mm, apex slightly acute, middle ones ovate-elliptic, ca. 2.5 × 1.8 mm, inner ones long elliptic, ca. 4 × 1.8 mm, apex obtuse or rounded; midvein convex. Paleae lanceolate, ca. 4.5 mm, sparsely villous in upper part. Ray florets 6-8(-16); lamina white, occasionally with pinkish margin, ca. 2.2 × 2.2 mm, apex deeply or shallowly 3-denticulate. Disk florets yellowish or white, tubular. Achenes oblong-cuneate, ca. 2.5 × 1.1 mm, with winged lateral ribs. Pappus absent. Fl. and fr. Jul-Sep.

  • Provided by: [B].Flora Of CHina @
    • Source: [
    • 1
    • ]. 

     Information From

    CC0 1.0 Universal (CC0 1.0).
    • A CC0 1.0 Universal (CC0 1.0).
    Flora Of CHina @
    'Flora of China @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Missouri Botanical Garden
    World Flora Online consortium
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).