Saussurea americana D. C. Eaton.
A peculiar plant with leafy stems, two to four feet high, bearing a dense cluster of elongate rayless heads of purple flowers. Found only on the high ridge north of the foot of Cowlitz Glacier.
Senecio ochraceus Piper.
Goat Mountains, Allen, No. 230.
Senecio triangularis Hooker.
A tall species with triangular coarsely dentate leaves and numerous rather small heads of yellow flowers. Abundant in the marsh at Longmire Springs and in wet places on the mountain slopes up to 6,000 feet altitude.
Senecio ductoris Piper.
A low species with thickish crenate leaves and deep yellow heads. Found only on the moraine on the south side of Cowlitz Glacier.
Senecio flettii Wiegand.
Found near Cowlitz Chimneys by Miss Winona Bailey, in 1915; previously known only from the Olympic Mountains.
Arnica latifolia Bongard.
A smooth cordate leaved plant with one to five heads, resembling small sunflowers. Not uncommon up to 6,000 feet altitude, especially in the shelter of timber.
Arnica mollis Hooker.
Similar to the preceding, but the leaves oblong, nearly entire, and viscid glandular. Abundant along the rivulets, 4,000 to 6,000 feet altitude.
Arnica aspera Greene.
Described from specimens collected in Spray Park. It is very similar to A. mollis Hooker, but the pubescence is coarser.
Arnica eradiata (Gray) Heller.
Closely related to the preceding but easily recognized by its rayless heads. It occurs on the steep slopes above Sluiskin Falls.