Aspen clones in varying degrees of deterioration were burned in northwestern Wyoming in an attempt to regenerate the site. Large numbers of aspen suckers are necessary to perpetuate these stands under current heavy ungulate use. Sucker numbers doubled the 2nd yr after burning and by the end of the 3rd yr had returned to near preburn levels of 15,000-20,000 suckers/ha. This slight increase in sucker numbers is probably not sufficient to regenerate the stands under current browsing pressures. Total understory production declined the 1st yr following fire and then increased to 3600 kg/ha in the 2nd yr, almost double preburn conditions. Production decreased the 3rd yr to .apprx. 1/3 greater than before burning. Forb and grass production increased and shrubs decreased as a result of burning. Fireweed (Epilobium angustifolium) was the largest post-fire contributor to total understory production.