From Boericke's materia medica:

Rag-Weed) A remedy for hay-fever, LACHRYMATION and INTOLERABLE ITCHING OF THE EYE-LIDS. Some forms of whooping-cough. Respiratory tract in its entire length stopped up. MANY FORMS OF DIARRHOEA, especially during summer months, also dysentery. 

Nose
Watery coryza; sneezing; watery discharge. NOSEBLEED. Stuffed up feeling of nose and head. Irritation of trachea and bronchial tubes, with asthmatic attacks. (ARAL.; EUCALYPT.) Wheezy cough. 

Eyes
Smart and burn. Lachrymation. 

Relationship
Compare in hay-fever: SABADILLA, WYETHIA; SUCCIN. AC.; ARS.IOD.; ARUNDO.