Helenium bigelovii
 

California—Klamath Region, Marble Mountains Wilderness, Haypress Meadows
July 2004

Samples recollected in North America  for Isolation of Active Antitumor Agents in the genus Helenium

Helenium hoopesii Colorado
Helenium mexicanum Puebla (Mexico)
Helenium microcephalum Texas

Helenium bigelovii

Kern Co., CA. Greenhorn Mts., Vicinity of Sunday Peak, 6 July 2016