World's oldest plant:A creosote plant found growing in southern California was estimated to be 11,700 years old.
World's fastest growing plant:[i]Hessperoyucca whipplei,[/i]a member of the lily family,grew 12 feet in 14 days in 1987 in Great Britian.
World's slowest growing plant:A rare Bolivian herb,Puya raimondii,grows for 80-150 years,blooms once,then dies.
World's dedliest plant:The castor bean plant produces seeds that contain an extremely poisonous protien called ricin.Ricin is 6,000 times more poisonous than cyanide.

Thanks rabieh for the valuable information.

i think the venus fly trap is cool

well,i think the castor bean plant is cooler whenever an insect stands on its beans, it will be the last step in that insect's life!!!!!!!!!!!!!!!!

true, so if you blend a castor bean plant and drink it will it kill you???

check this site it helps u a lot with your question .
http://webecoist.com/2008/09/16/16-most-unassuming-yet-lethal-killer-plants/

click Castor beans in the previous site or open this page.
http://www.usatoday.com/tech/columnist/aprilholladay/2006-03-20-poison-fish_x.htm

thank you for the link. I checked it out, and found out a lot of things i didn't know.

ur welcomed