Tanacetum cinerariifolium

Tanacetum cinerariifolium (Trevir.) Sch.Bip., 58 1844. (Syn: Chrysanthemum cinerariifolium (Trevir.) Vis.; Chrysanthemum rigidum Vis.; Chrysanthemum turreanum Vis.);
 
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Tanacetum cinerariifolium (Trevir.) Sch. Bip. from Kashmir: Tanacetum cinerariifolium (Trevir.) Sch. Bip., Tanaceteen 58. 1844

Syn: Pyrethrum cinerariifolium Trevir. (basionym);Chrysanthemum cinerariifolium (Trevir.) Vis.
Common names: Pyrethrum, Dalmatian insect-flower, Dalmatian pyrethrum
Perennial herb reaching 55 cm, unbranched or branched from base, pubescent with silvery-grey hairs; leaves alternate, lower long-petiolate, 2-3-pinnatisect with linear-oblong less than 2 mm broad silverygrey segments, upper leaves smaller, short-petioled, uppermost sessile; heads terminal, usually solitary on long peduncle, rarely in corymbs, radiate, 2-4 cm across, with yellow centre (disc florets) and usually 12-15 white ray florets which are 10-15 cm long and 3-toothed at tip; achenes 3-3.5 mm long, 5-ribbed.
The plant is cultivated in Kashmir at many places for extraction of pyrethrin used as insecticide; dried flower heads are pulverised to extract the active principle; crushed leaves and flower heads rubbed on body prevent insect bite.  
Photographed from Herbal garden below Cheshma shahi in Srinagar, Kashmir.

 
Tanacetum cinerariifolium (Trevir.) Sch. Bip., Tanaceteen 58. 1844

Syn: Pyrethrum cinerariifolium Trevir. (basionym);Chrysanthemum cinerariifolium (Trevir.) Vis.
Common names: Pyrethrum, Dalmatian insect-flower, Dalmatian pyrethrum
Perennial herb reaching 55 cm, unbranched or branched from base, pubescent with silvery-grey hairs; leaves alternate, lower long-petiolate, 2-3-pinnatisect with linear-oblong less than 2 mm broad silverygrey segments, upper leaves smaller, short-petioled, uppermost sessile; heads terminal, usually solitary on long peduncle, rarely in corymbs, radiate, 2-4 cm across, with yellow centre (disc florets) and usually 12-15 white ray florets which are 10-15 cm long and 3-toothed at tip; achenes 3-3.5 mm long, 5-ribbed.
The plant is cultivated in Kashmir at many places for extraction of pyrethrin used as insecticide; dried flower heads are pulverised to extract the active principle; crushed leaves and flower heads rubbed on body prevent insect bite.  
Photographed from Herbal garden below Cheshma shahi in Srinagar, Kashmir. 

 
  
 
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