Status in Nova Scotia
Reliable in some locations, but thinly-spread. Ferguson mentioned a colony on the road to Beinn Bhreagh and we collected one specimen there in the early 1980s. We didn't see any in this location on a subsequent visit some years later. Our first recent encounter was in the Parrsboro area on July 2, 2000. With increasing awareness on the part of some observers, this species is now being reported regularly.
Two broods: first brood early May to early July; second brood mid-July to mid-September.
Deciduous woods and bogs.
Various mustard family plants.
Similar Species in Nova Scotia
The Mustard White is similar to the Cabbage White
, but the hind wings of the Cabbage White lack the conspicuous gray-green striping on the underside.
This species was formerly quite common in Nova Scotia, but is now scarce. Recent research indicates that this may be a different species from the related "Green-veined White" of Europe.