Achillea erba-rotta

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Achillea erba-rotta
Asteraceae - Achillea erba-rotta-1.JPG
Flowers of Achillea erab-rotta
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Achillea
Species: A. erba-rotta
Binomial name
Achillea erba-rotta
All.

Achillea erba-rotta, common name Simple Leaved Milfoil, is a perennial flowering plant of the genus Achillea, belonging to the Asteraceae family.

Description[edit]

Achillea erba-rotta is a polymorphic species, as its physical characteristics clearly vary depending on the variety. The biological form is chamaephyte suffruticose,[1] as these plants have perennating buds borne close to the ground and are woody in the lower part of the stem, with herbaceous yearly branches. The primary root is a rhizome.

Close-up of a flowers, lateral view

This plant reaches on average 12–18 centimetres (4.7–7.1 in) in height.[1] The stems are woody and creeping, almost glabrous or with short hair and with erect flowering branches. Leaves of sterile branches are lanceolate-spatulate, 5-7 mm wide and 26-30 mm long, with 4-7 teeth on each side.[1] Cauline leaves are alternate, sessile, toothed and progressively linear, about 2-3 mm wide and 11-22 mm long.[1] Flowers are hermaphroditic and pentamerous, arranged in corymbs with many heads, about 3 mm in diameter, with rounded ligules.[1] The flowering period extends from July through August. The fruit is a flattened achene without pappus.

Distribution[edit]

This typical plant of Alps is present in Italy, France, Switzerland and Austria.[1] [2]

Habitat[edit]

It prefers a sunny location in alpine pastures and rocky areas, at an altitude of 2,000–2,800 metres (6,600–9,200 ft) above sea level.[1]

Synonyms[edit]

  • Achillea herba-rota Vill., Prosp. Hist. Pl. Dauphiné 32. 1779, sphalm.
  • Ptarmica erba-rotta (All.) DC., Prodr. (Candolle) 6: 22. 1838, as herba-rota Achillea cuneifolia Lam.
  • Achillea haussknechtiana Asch.
  • Achillea morisiana Rchb.
  • Achillea nana Lam.
  • Ptarmica erba-rotta (All.) DC. [3]

Subspecies[edit]

  • Achillea erba-rotta subsp. moschata (Wulfen) Vacc.

Hybrids[edit]

  • Achillea × obscura Nees

References[edit]

  1. ^ a b c d e f g Pignatti S. – Flora d'Italia – Edagricole – 1982. Vol. III, p. 78
  2. ^ Hortipedia
  3. ^ Synonyms in Catalogue of life
  • Tutin, T.G. et al. – Flora Europaea, second edition – 1993

External links[edit]