Editing Pyrethrum (section)

==Description==
Some members of the genus ''Chrysanthemum'', such as the following two, are placed in the genus ''[[Tanacetum]]'' instead by some botanists. Both genera are members of the daisy (or aster) family, [[Asteraceae]]. They are all [[perennial plant]]s with a daisy-like appearance and white [[petal]]s.

{{anchor|Tanacetum cinerariifolium}}
* [[Image:Tanacetum cinerariifolium1.jpg|thumb|''Tanacetum cinerariifolium'']] ''[[Tanacetum cinerariifolium]]'' is called the Dalmatian chrysanthemum, denoting its origin in that region of the Balkans ([[Dalmatia]]). It looks more like the common daisy than other pyrethrums do. Its flowers, typically white with yellow centers, grow from numerous fairly rigid stems. Plants have blue-green leaves and grow to {{convert|45|to|100|cm|abbr=on}} in height. The plant is economically important as a natural source of pyrethrin [[insecticide]]s.
* [[Image:Tanacetum coccineum2.jpg|thumb|''Tanacetum coccineum'']]''[[Chrysanthemum coccineum|C. coccineum]]'', the Persian chrysanthemum, is a perennial plant native to [[Caucasus]] and looks somewhat like a [[Asteraceae|daisy]]. It produces large white, pink or red flowers. The leaves resemble those of [[fern]]s, and the plant grows to between {{convert|30|and|60|cm|abbr=on}} in height. The flowering period is June to July in temperate climates (Northern Hemisphere). ''C. coccineum'' also contains insecticidal pyrethrins, but it is a poor source compared to ''C. cinerariifolium''.
* Other species, such as ''C. balsamita'' and ''C. marshalli'', also contain insecticidal substances, but are less effective than the two species mentioned above.

[[File:Tanacetum cinerariifolium MHNT.BOT. 2012.10.14.JPG|thumb|''Tanacetum cinerariifolium '']]