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University of Wyoming

» Floristics » Colorado Projects

San Miguel and Lower Dolores River Drainages

Margarette J. Lyon

Inventory dates: 1993, 1994

Thesis: Lyon, M. J. 1996. A Floristic Survey of the San Miguel and Lower Dolores River Drainages, Colorado and Utah, vii + 163 pp.

This represents a thesis project by Margarette J. Lyon. Fieldwork was conducted during the summers of 1993 and 1994. The area encompassed the Colorado Plateau-Canyonlands portion of the San Miguel National Forest (Mesa, Montrose, and San Miguel counties) for a total of 2,500 mi2 ranging in elevation from 4,095 to 14,071 feet. Collected were 7,163 specimens documenting 997 unique taxa. An additional 201 “historical” taxa at the RM/USFS raised the total unique taxa to 1,198. Species of conservation concern totaled 26 documented at 71 sites. Also vouchered were 68 exotics and noxious weeds. Funding was provided by the Bureau of Land Management-Montrose District, Uncompahgre National Forest, The Nature Conservancy, Colorado Natural Heritage Program, and the University of Wyoming.

Results & Data

Project Area:
2500 mi.2
# of Collections:
# of Taxa Collected:
# of Historical Taxa:
201 (additional taxa documented only from historical collections)
# of State Records:
# of Sensitive Taxa:
26 (documented from 71 sites)
# 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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