Citation: L., Sp. Pl. 843 (1753).

Derivation: Greek and medieval Latin athanasia, immortality, perhaps via the Old French tanesie, in reference to the use of T. vulgare L. as a medicinal herb.

Synonymy: Not Applicable

Common name: None

Description:
Perennial herbs, aromatic, with rbizomes; leaves cauline, alternate, pinnately dissected.

Capitula pedunculate in terminal corymbs, discold or radiate, heterogamous; involucres ovoid to hemispherical; bracts herbaceous to scarious, imbricate in 3 series; receptacle convex, naked; outer florets uniseriate, female, tubular with a 3-lobed corolla or ligulate; style branches linear, recurved, with truncate papillose apices; disk florets tubular, 5-merous, bisexual, fertile; corolla glandular, narrow at the base, campanulate above, yellow; anthers obtuse at the base with ovate apical appendages; style branches broadly linear, truncate with papillose apices.

Achenes all similar, compressed, symmetrical, ribbed; pappus of scales fused into a scarious crown.

Distribution:  About 70 species in Europe and Asia; at least 2 naturalised in Australia.

Biology: No text

Key to Species:

1. Capitula radiate	T. parthenium 2.
1. Capitula discoid
2. Leaves bipinnatisect, pubescent to tomentose	T. boreale 1.
2. Leaves pinnatisect with toothed segments, glabrous	T. vulgare 3.

Author: Not yet available