Thornton's mother, wary of Margaret's haughty ways, is galled by Margaret's rejection of her son. They deposit their eggs in a gelatinous mass, which usually protrudes from galled root tissue. Fourteen genera within the Asteraceae are also galled by "P. macrosporus". There, she was said to be "terribly galled and otherwise in very bad shape". Infestations do not have any serious effect upon galled trees. It is cured by clay laid on the galled place, and bound up with hay. Some floral buds do not open because they are galled by flies ("Dasineura" sp., Cecidomyiidae). The galled section of the stem is wide and up to long. Galled buds appear light green at first and turn brown later in the year.