Achillea alpina

Linnaeus

Sp. Pl. 2: 899. 1753

Common names: Siberian yarrow achillée de Sibérie
Synonyms: Achillea sibirica Ledebour
Treatment appears in FNA Volume 19. Treatment on page 494. Mentioned on page 493.
Perennials, 50–80 cm (fibrous-rooted and rhizomatous). Stems 1, erect, branched or unbranched distally, sparsely villous to glabrate. Leaves sessile; blades linear-lanceolate to oblong-lanceolate, 5–10 cm × 4–8 mm, (margins serrate to doubly serrate, teeth antrorse) faces sparingly villous or glabrate. Heads 10–25+, in crowded, simple or compound, corymbiform arrays. Phyllaries 20–30 in ± 3 series, (light green, margins light to dark brown, midribs dark green or yellow-green) lanceolate to oblanceolate, faces (abaxial) sparingly tomentose. Receptacles convex; paleae oblong, 3.5–4.5 mm (apices dark, rounded). Ray florets 6–8(–12), pistillate, fertile; corollas white, laminae 1–3 × 2–3 mm. Disc florets 25–30+; corollas grayish or yellowish white, 2–3 mm. Cypselae 2.5 mm. 2n = 36.

Phenology: Flowering early Jul–early Sep.
Habitat: Meadows, forest edges, roadsides, lakeshores, along streams, moist soils
Elevation: 100–600 m

Distribution

V19-825-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Que., Sask., Yukon, Alaska, Minn., N.Dak., Asia.

Discussion

Achillea alpina has been reported (as A. sibirica) as occurring in New Jersey and Missouri. Specimens examined from those states were from plants cultivated in botanical gardens; there is no evidence that Achillea alpina has escaped in those states.

References

None.

Lower Taxa

No lower taxa listed.