Steve - its hard to guess your " weed" - but kind of fun too - I' ll post a couple links - have a look and let us know what you think.
Foxtail
http://www.agf.gov.bc.ca/cropprot/weedguid/foxtailb.htm
Queen anne' s lace
http://www.fcps.k12.va.us/StratfordL...annes_lace.htm
orchard grass
http://www.kiowacd.org/Products/Gras...chardgrass.htm
reed canary grass
http://www.css.cornell.edu/forage/re...rasslide3.html
It could be something else - Let us know any other characteristics