30 Years of Botanizing in the Intermountain West

The Intermountain West, an area the size of Texas that stretches from the Rocky Mountains to the Sierra Nevada, harbors some 4,000 species of vascular plants. Noel H. Holmgren and Patricia K. Holmgren are engaged in a marathon project to collect, catalog, and describe them all.

They have been collaborating on the effort for more than 30 years -- ever since they were married, in 1969. Since then, they have spent all or part of almost every summer exploring the region in a camper that,

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