Anthocharis s. sara
A true harbinger of the beginning of the butterfly season in many areas, the Sara Orangetip can be common where the host mustards are present. Sara usually has two broods: the first is smaller, with males the first to emerge (often in February). The larger-sized second brood - with lighter markings on the underside - typically flies in May-June as conditions allow. As someone who grew up in the suburbs of Los Angeles, this was a butterfly I had to get out into the field to see and photograph, and I remember well the excitement I felt seeing them the first time in abundance early one year at Malibu Creek State Park, camera in hand.
What would become Anthocharis sara was collected by Pierre Lorquin in California during the gold rush and sent to the Musée de Paris in 1851. Boisduval then named it and presented a paper on this and other new butterflies at a 1852 meeting of entomologists. However, Pierre Lucas' redescription happened to beat Boisduval's paper to print, so Lucas is considered the author. Emmel, Emmel and Mattoon fixed as the Type Locality the Queen Lily Campground near Belden, North Fork of the Feather River, in Plumas County, CA. in the 1998 Systematics book (see "The Types of California Butterflies Names by Pierre Hippolyte Lucas: Designation of Lectotypes and Fixation of Type Localities," pp.77ff.).