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University of Wyoming

» Floristics » Projects

Powder River Basin

Keith H. Dueholm

Inventory dates: 1978, 1979

Thesis: Dueholm, K. 1980. A Floristic Inventory of the Powder River Basin, Wyoming. (not completed)

This represents the thesis project by the late Keith H. Dueholm. Fieldwork was conducted during the summers of 1978 and 1979. The area encompassed was the basin from the Black Hills west to the Big Horn Mountains and the Laramie Range north to Montana; Great Plains grasslands, Rochelle Hills with ponderosa pine, and scoria outcrops (Campbell, Converse, Crook, Johnson, Natrona, Niobrara, Sheridan, and Weston counties) for a total of 19,772 mi2 ranging in elevation from 3,500 to 6069 feet. Collected were 13,000+ specimens documenting 900 total unique taxa. Also vouchered were numerous exotics, including 14 noxious weeds. Funding was provided by the Rocky Mountain Institute of Energy and Environment, University of Wyoming. Thesis never completed.

Results & Data

Project Area:
19772 mi.2
# of Collections:
# of Taxa Collected:
# of State Records:
# of Sensitive Taxa:
# of Exotic Taxa:
# of Noxious Weeds:

Project Map:

Map shows the approximate project boundary. Collection sites are displayed as red dots. Click on a dot to view site information and a list of specimens from that site.

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