The shell color is typically a light yellowish-brown with irregular lighter, subsutural maculations, very occasionally with pink or purple beads or rarely a stripe.
32.
The ground colour of the forewings is restricted to irregular orange maculation ( spots ), lines extending from the costa and a small area beneath the apex.
33.
The forewings have a dark brown base and the outer margin consists of a straight diagonal line from the costa to the maculation of the central hind margin.
34.
The base color is a light reddish brown with irregular maculations of darker brown above and a row of small alternating white and dark brown spots encircling the whorls.
35.
The maculation of the forewings is obscure, but in well-marked specimens the median area is shaded with smoky and forms an oblique band across the wing.
36.
The forewings are creamy white, with small sparse costal and subterminal maculations ( spots ) in brown, and two short longitudinal streaks, one basally on the costa.
37.
Populations from the Cascade Mountains tend to be slightly greyer and have more clearly defined maculation than specimens from the coastal areas of British Columbia, Washington and central California.
38.
It is unique in its growth habit; its leaves are sometimes toothed; it does not easily propagate by leaf-cuttings; and it has no leaf maculation.
39.
The signature mark of all butterflies is the cryptic colour and maculation of the ventral ( under ) side of their wings, serving to conceal the hibernating butterfly against the substrate on which it rests.
40.
The antemedial fascia of the forewings is edged distally by large brown maculations and there is a small dark discocellular spot, as well as a large brown maculation distal to the end of the cell.
