i was surprised to find loco weed, (jimson weed, datura,) growing
near my house after the fire. The seeds must be fire dependant
or oportunistic.


http://www.saguaro-juniper.com/i_and_i/flowers/datura/datura.html
http://en.wikipedia.org/wiki/Datura
http://www.buzzle.com/articles/datura-plant.html
http://www.ansci.cornell.edu/plants/jimsonweed/jimsonweed.html
http://www.desertusa.com/aug97/du_datura.html

i doubt if these would be in any nutritional mix.