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Published In: Species Plantarum 2: 896. 1753. (1 May 1753) (Sp. Pl.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 6/2/2011)
Acceptance : Accepted
Project Data     (Last Modified On 6/3/2011)
Synonym Text: Ptarmica DC., Prodr. 6: 29. 1837; Arthrolepis Boiss., Diagn. Pl. Or. Nov. Ser. 1, 11: 14. 1849.
General/Distribution: A genus of 115 species, distributed in Eurasia and Mediterranean region. Represented by 5 species in Pakistan.

 

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Perennial, often pilose herbs, usually with thick woody rootstock. Leaves alternate, undivided-serrulate or 3-4-pinnatipartite or pinnatisect. Capitula small to mediocre, heterogamous, radiate or not, long-peduncled to sometimes sessile, borne in terminal corymbs or solitary at the apices. Involucre oblong-cylindrical to depressed subglobose or hemispherical, phyllaries without or with narrow to broadly hyaline margins. Receptacle ± flat or convex, with lanceolate or oblong, scarious paleae. Ray-florets female, with 3-dentate, white or yellow ligules. Disc-florets bisexual, with ± compressed, regularly 5-dentate corolla tube. Cypselas oblong to obovoid, compressed, glabrous, wingless, bald, apically enveloped by pouched bases of corolla tube.
 

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1 Ligules white or pale-white. (4)
+ Ligules bright yellow to golden yellow. (2)
2 (1) Leaves with ultimate segments linear to setaceous and acute or oblong-lanceolate and ± obtuse. Plants usually more than 50 cm tall. (3)
+ Leaves with ultimate segments orbicular to broadly cuneate, denticulate on margins, imbricate. Plants not more than 35 cm tall. 1 Achillea wilhelmsii
3 (2) Leaves usually densely appressed hairy, with oblong-lanceolate, subacute ultimate segments. Rachis more than 1.5 mm wide. 3 Achillea filipendulina
+ Leaves usually densely pilose, with linear, cute-acuminate ultimate segments. Rachis up to 1 mm wide. 2 Achillea biebersteinii
4 (1) Leaf rachis 1.5-2 mm wide. Ultimate leaf segments narrowly linear-oblong to lanceolate, mucronate. Ligules 1.5-2 mm long, white. 4 Achillea millefolium
+ Leaf rachis less than 1 mm wide. Ultimate leaf segments setaceous, acuminate. Ligules less than 1.5 mm long, pale-white. 5 Achillea setacea
 
 
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