Most common plant implicated in the causation of dermatitis is
Pahenium dermatitis is caused by dry powder of leaves and flowers and hair-like structures (trichomes). Sesquiterpene lactones (SQLs) are the most impoant allergens responsible for ACD to pahenium. Ref Harrison20th edition pg 1234
Cotton fibres
Poison ivy
Pahenium grass
Ragweed
Dermatitis