National Collection of Imperiled Plants

CPC National Collection Plant Profile

Photographer:

Joyce Maschinski

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CPC National Collection Plant Profile

Erigeron maguirei var. maguirei

Family:	Asteraceae
Common Name:	Maguire daisy
Author:	Rydb.
Growth Habit:	Forb/herb
CPC Number:	1654

Distribution
Protection
Conservation
References

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Photographer: Joyce Maschinski
jmaschinski[at]fairchildgarden.org

Erigeron maguirei var. maguirei is Fully Sponsored

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

The Arboretum at Flagstaff

Joyce Maschinski, Ph.D. contributed to this Plant Profile.

Erigeron maguirei var. maguirei

Erigeron maguirei var. maguirei is no longer recognized as a true variety, as DNA analysis was not able to show any variation between the formerly recognized varieties E. maguirei var. maguirei and E. maguirei var. harrisonii (Van Buren 1993). This was supported by the recently published volume 5 of the Intermountain Flora (Cronquist et al. 1994). Because of these findings, Erigeron maguirei var. maguirei was sunk into protection under the species Erigeron maguirei, which was then downlisted from federally endangered to federally threatened in 1996, with no recognized infraspecific varieties. (USFWS 1996)

Maguire daisy is a small perennial, herbaceous plant with spatulate-shaped hairy leaves and dime-sized pinkish white daisy flowers. Bits of sand commonly cling to the hairs of the leaves and stems.

Distribution & Occurrence

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State Range

Utah

Habitat

This species is found growing in slickrock crevices, on ledges, and in the bottom of canyon washes in the Navajo Sandstone formation at elevations of 1600 to 2500 meters. (State of Utah Natural Resources 2002)

Distribution

Found in three counties in Utah (Emery, Garfield and Wayne) (State of Utah Natural Resources 2002).

Number Left

At the time of reclassification in 1996, the U.S. Fish and Wildlife Service stated that there were around 3,000 individuals of Erigeron maguirei documented at 12 different sites. These 12 sites are reproductively isolated, and so are separate populations. (USFWS 1996)

Protection

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Global Rank:	G2	8/4/1999	Guide to Global Ranks
Federal Status:		10/24/1996	Guide to Federal Status
Recovery Plan:	Yes	8/15/1995

State/Area Protection

	State/Area	Rank	Status	Date
	Utah	S2		6/1/1998

Conservation, Ecology & Research

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Ecological Relationships

Unknown.

Threats

Threats include (as stated by the USFWS (1996)):
� Loss of habitat and genetic viability
� Off-road vehicles
� Trampling by humans and livestock
� Mineral and energy exploration and development

Current Research Summary

Van Buren (1993) determined that variety maguirei and var. harrisonii were synonymous through genetic studies.

In 1991, the Arboretum at Flagstaff conducted germination trials and found that seeds could germinate equally well under a variety of conditions. Those tested were 1 and 2 month stratification and direct mist. Germination rates were 30%, 24%, and 26% respectively.

Current Management Summary

None known.

Research Management Needs

There is need for research on biological and ecological factors controlling the viability of the Maguire daisy, minimum population viability studies, and horticultural requirements.

Ex Situ Needs

References

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Books (Single Authors)

Albee, B.J.; Shultz, L.M.; Goodrich, S. 1988. Atlas of the vascular plants of Utah. Salt Lake City, UT: Utah Museum Natural History.

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)

Kartesz, J.T. 1999. A synonymized checklist of the vascular flora of the U.S., Canada, and Greenland. In: Kartesz, J.T.; Meacham, C.A., editors. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden. Chapel Hill, NC.

Conference Proceedings

Heil, K.D.; Porter, M.; Flemming, R.; Rome, W. Rare Plant Diversity Between Capital Reef National Park and Canyonlands, Arches National Parks and Bridges National Monument of Southeastern Utah. Proceedings of the Southwestern Rare and Endangered Plant Conference; 30 March - 2 April; Santa Fe, NM. In: Sivinski, R.; Lightfoot, K., editors. 1992. New Mexico Forestry and Resources Conservation Division. p 78-102.

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.

USFWS. 1984. Four Plants in Danger. Endangered Species Technical Bulletin. 9, 8: 1, 5-7.

USFWS. 1996. Reclassification of Erigeon maguirei (Maguire daisy) From Endangered to Threatened. Federal Register. 61, 119: 31054-31058.

Welsh, S.L.. 1983. A bouquet of daisies erigeron compositae. Great Basin Naturalist. 43, 2: 365-368.

Reports

USFWS. 1995. Maguire daisy (Erigeron maguirei) recovery plan. Denver, Colorado: U.S. Fish and Wildlife Service. p.13.

Van Buren, R. 1993. Randomly amplified polymorphic DNA and resolution of classification problems in Erigeron (Asteraceae). Report prepared for the U.S. Fish and Wildlife Service, Salt Lake City, Utah. 10pp. Abstracted in the American Journal of Botany 1994, 81(6): 197-198.

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This profile was updated on 3/4/2010