United States, California, Siskiyou, Road to trailhead for Black Butte Trail. (Study site 25).
41.374444 -122.333611 +-36m.
41§ 22m 28s N; 122§ 20m 1s W
1354 meters
4441ft.
Petals white with maroon patch, hidden in yellow-green bracts, visited by bumblebees. Plants to three feet tall. Dense population of about 7400 plants along roadside in mixed conifer forest (Abies x magnifica, A. concolor, Pseudotsuga menziesii, Pinus ponderosa, Calocedrus decurrens) on pale volcanic soil.