Family |
Asteraceae
Tanacetum argenteum
(Lam.) Willd.
Leb. Syr. Tur.
Tanacetum argenteum (Lam.) Willd.
First published in Diss. de Achill.: 51 (1789).
(Nouvelle Flore du Liban et de la Syrie, vol. 3, p. 424, Pl. CCXXXVI, 2; 1983)
Description
Synonym: Achillea argentea Lam.
Life-form & habit: Tufted perennial, 10–40 cm tall, densely covered with appressed silky hairs. Sterile and flowering stems ascending and densely leafy at the base.
Leaves: Stalked, oval in outline, deeply pinnately divided into five to seven slightly decurrent segments. Segments wedge-shaped at the base and divided into three to seven short oblong-linear, somewhat blunt lobules. Upper leaves greatly reduced.
Inflorescence & flowers: Dense, terminal, compound, head-like corymb, with stalks shorter than the obovoid to inversely conical flower heads. Heads lack marginal ray florets. Involucre hairy; bracts blunt, the outer ones shorter and linear-spatulate, the inner ones oblong-spatulate with broadly papery tips.
Fruit: Achenes with five prominent ribs and a long, toothed crown, sometimes developed on only one side.
Flowering and habitat
Phenology: June–August.
Habitat & elevation: Mountain rocks.
Distribution
Lebanese distribution: Sannine, Ain el Qarn, above Dimane and Hasroun, the Cedars, Cedars Pass and Makmel.
Syrian distribution: Talaat Moussa, Jabal Halime, Zemrani and above Bloudane.
Recorded locations: Sannine.
Native range: Iran, Iraq, Lebanon-Syria and Türkiye.
Introduced into: NW. Balkan Pen.