Lyall's Goldenweed, Lyall's Haplopappus, Lyall's Serpentweed
Tonestus lyallii
Synonym: Haplopappus lyallii
The
photo at right shows Lyall's goldenweed as seen atop Arsenic Mt., at the eastern
edge of the Bob Marshall Wilderness.........July 28, 1999.
Lyall's goldenweed is an attractive perennial wildflower with several erect, leafy stems arising from 3-15 cm high. The herbage of the leaves and stems is rough or softly pubescent and strongly glandular. The basal leaves are oblanceolate to broadlyh spatulate in shpae with entire margins and three nerves in the blades. The basal leaves range from 1.5-7 cm in length (including the wide petioles) and 4-12 mm wide. The stem leaves are also well-developed (as seen in the photo at right).
The flower heads are solitary with cup-shaped involucres. The involucres are 6-12 mm high with sub equal bracts, the bracts of 2-3 different lengths. Individual bracts are lance-oblong in shape, herbaceous, and with acute tips. They are rough and glandular and are often reddish tinged. The 12-35 yellowish rays measure from 6-11 mm long and surround a yellow central disk.
Lyall's goldenweed may be found at high altitudes in the mountains on rocky or talus slopes.
Lyall's goldenweed is found from British Columbia south through Washington, northeastern Oregon into northeastern nevada and east to Alberta, Montana, and Colorado.
