Pyrethrum - Plant? I am urgently looking for a picture of this...Proper name is Tanacetum?

[Tony Lowe]

Hi, Tanacetum is Tansy,Pyrethrum as used as herbicide is 
Pellitory(Anacyclus) although it is often spoken as a different variety, 
Pellitory persia(chrysanthemum roseum)strangely enough chrysantemum ,this 
is the variety I use as herbicide.To confuse matters Fever few is also 
Pyethrum and this is the Pyrethrum I use medically.What do you wish to 
achieve with it.
                                   tony (aka. warlock)