National Collection of Imperiled Plants

CPC National Collection Plant Profile

Photographer:

C.R. Delmatier

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CPC National Collection Plant Profile

Primula maguirei

Family:	Primulaceae
Common Name:	Maguire primrose
Author:	L.O. Williams
Growth Habit:	Forb/herb
CPC Number:	3620

Distribution
Protection
Conservation
References

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Photographer: C.R. Delmatier
Image Owner: USFS

Primula maguirei is Not Sponsored

Primary custodian for this plant in the CPC National Collection of Endangered Plants is:

Red Butte Garden and Arboretum

Sylvia Torti contributed to this Plant Profile.

Primula maguirei

The Maguire primrose is a perennial herbaceous plant with bright-green, spatula-shaped leaves. From mid-April to mid-May, this beauty produces showy, reddish lavender flowers approximately 1 inch across that are borne on graceful stems up to 6 inches high. Unfortunately, this species is very rare and found only in one canyon system in Utah. It was listed as a Federally Endangered plant in 1985)

Distribution & Occurrence

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State Range

Utah

Habitat

This species is restricted to cool, moss-covered dolomite cliffs and boulders in the lower elevations of Logan Canyon. The species may be dependent on the calcium and magnesium carbonates of its soil substrate. (USFWS 1990)

Distribution

This species is only found in Logan Canyon, northern Utah. (USFWS 1985)

Number Left

The estimated population size is 3000 individuals in 6 known locations. (USFWS 1990)

Protection

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Global Rank:	G1	1/1/1996	Guide to Global Ranks
Federal Status:	LT	8/21/1985	Guide to Federal Status
Recovery Plan:	Yes	9/27/1990

State/Area Protection

	State/Area	Rank	Status	Date
	Utah	G1	LT	8/21/1985

Conservation, Ecology & Research

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Ecological Relationships

� Reproduction is likely sexually, via seed production.
� Both bees and flies have been observed visiting flowers of this species. Specific pollinators, however, are yet unknown. (Beedlow et al. 1980, and Padgett 1986).

Threats

� Road construction
� Water development
� Recreational rock climbing
� Amateur horticultural collecting
(State of Utah Natural Resources 2002)

Current Research Summary

None known.

Current Management Summary

This species occurs on federal lands managed b y the Logan Ranger District of the Wasatch-Cache National Forest.

Research Management Needs

� Seed germination or tissue culture propagation protocols must be established.
� Environmental factors that govern the distribution of this species are not well understood, nor are the long-term
population dynamics.

Ex Situ Needs

Successful propagation of this species is critical.

References

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Books (Single Authors)

Welsh, S.L. 1979. Illustrated manual of proposed endangered and threatened plants of Utah. Provo, UT: Brigham Young University. 318p.

Welsh, S.L.; Atwood, N.D.; Goodrich, S.; Higgins, L.C. 1993. A Utah flora. Provo, Utah: Brigham Young Univ. 986p.

Books (Sections)

Niering, W.A. 1988. Endangered, Threatened, and Rare Wetland Plants and Animals of the Continental United States. In: Hook, D.D.; McKee, W.H.; Smith, H.K.; Gregory, J.; Burrell, V.G., Jr.; DeVoe, M.R.; Sojka, R.E.; Gilbert, S.; Banks, R.; Stolzy, L.H.; Brooks, C.; Matthews, T.D.; Shear, T.H., editors. The Ecology and Management of Wetlands. Timber Press. Portland, OR. p 592.

Electronic Sources

(2002). Rare Plant Profiles. [Searchable Web site] State of Utah Natural Resources, Division of Wildlife Resources. http://www.utahcdc.usu.edu/rsgis2/Search/SearchSelection.asp?Group=PLANT&Species=PLANT. Accessed: 2002.

Journal Articles

1988. Threatened and Endangered Plants Summary. Sego Lily: Newsletter of the Utah Native Plant Society. 15: 2.

Boyack, A. 1988. Primula maguirei shows its splendor. Sego Lily: Newsletter of the Utah Native Plant Society. 15: 1, 10.

Boyack, A. 1988. Threatened and Endangered Species Conference. Sego Lily: Newsletter of the Utah Native Plant Society. 15: 1, 10.

Holmgren, N.H.; Kelso, S. 2001. Primula cusickiana (Primulaceae) and its varieties. Brittonia. 53, 1: 154-156.

USFWS. 1984. Final Rule to Determine Primula maguirei (maguire primrose) to be a Threatened Species. Federal Register. 50, 162: 33731-33734.

USFWS. 1984. Four Western Plants. Endangered Species Technical Bulletin. 9, 5: 8-9.

USFWS. 1984. Proposal to Determine Primula maguirei (maguire primrose) to be a Threatened Species. Federal Register. 49, 73: 14771-14774.

USFWS. 1985. Final Endangered Species Act Protection for Four Plants and Three Fishes. Endangered Species Technical Bulletin. 10, 9: 6.

Welsh, S.L.; Atwood, N.D.; Reveal, J.L. 1975. Endangered, threatened, extinct, endemic, and rare or restricted Utah vascular plants. Great Basin Naturalist. 35: 327-376.

Welsh, S.L.; Chatterley, L.M. 1985. Utah�s rare plants revisited. Great Basin Naturalist. 45: 173-236.

Williams, L.O. 1936. Revision of the western Primulas. American Midland Naturalist. 17: 741-748.

Wolf, P.G.; Sinclair, R.B. 1997. Highly differentiated populations of the narrow endemic plant Maguire primrose (Primula maguirei). Conservation Biology. 11, 2: 375-381.

Reports

Beedlow, P.A.; Carter, J.G.; Smith, F.J. 1980. Primula maguirei L. Wins. (Primulaceae), a preliminary report on the population biology of an endemic plant. Salt Lake City, Utah: Unpublished report on file with U.S. Fish and Wildlife; Service. p.3.

Franklin, M.A. 1990. Report for 1990 Challenge Cost Share project, Wasatch-Cache National Forest. Target species: Primula maguirei L.O. Williams (Maguire primrose). Salt Lake City: Utah Natural Heritage Program, Department of Natural Resources. p.5 + appendices.

Padgett, W.G. 1986. Maguire primrose status report. Logan: Unpublished report prepared by Utah Native Plant Society. p.15.

Padgett, W.G. 1986. Maguire primrose: A Report on the Findings of the 1986 Field Survey. Cache Valley Chapter of the Utah Native Plant Society: U.S. Fish and Wildlife Service. p.4 + appendices.

USFWS. 1990. Maguire Primrose (Primula maguirei) Recovery Plan. U.S. Fish and Wildlife Service: Denver, Colorado. p.13.

Welsh, S.L. 1979. Status report Primula maguirei. Salt Lake City, Utah: Unpublished report on file with U.S. Fish and Wildlife Service. p.12.

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This profile was updated on 9/28/2010