Distribution and biological peculiarities in Armenia: The species is distributed in South-eastern Europe, Asia Minor, Syria, Iran, Transcaucasia and to the east to Pamirs-Alai, and Himalaya. Armenia is inhabited by subspecies G. f. turcirana de Freina, 1983, which occupies semi-deserts and dry mountain steppes at the elevation range from 600 to 1500 m a.s.l.; the obligate factor is an existence of Rhamnus pallasii - the host-plant of Powdered Brimstone. The species gives one generation per year having imago hibernating, thus this is one of the earliest species in Armenia which begins flying in early March and is on wing until late May, and then hatches out in mid to late June and keeps flying until late September to late October depending on elevation.
Population dynamics: The species is slightly uncommon within typical habitat, and demonstrates stable population trend during 2003-2013 (p<0.05), which is most probably conditioned by resistance of the host-plant towards human activities, and nomadic grazing in particular. Sometimes it occurs that local shepherds use that bush for local fire, however they usually use dry sticks and do not affect the Rhamnus pallasii's population.
Conservation measures: The species is not included in the Global and Armenian Red Lists, as well as in CITES and Bern Conventions, however it was assessed for the European Red Book as Least Concern. The same status is proposed for Armenia, especially taking into consideration that the distribution range of Powered Brimstone is covered by number of protected areas, Emerald Sites, and Prime Butterfly Areas. Nevertheless, taking into account high level of the species' specialization towards habitat and host-plant, it is suggested to continue its monitoring.