The following Participating Institutions are custodians for this species in the CPC National Collection:
The Arboretum at Flagstaff
The conservation of Erigeron maguirei var. maguirei is fully sponsored.
Joyce Maschinski, Ph.D. contributed to this Plant Profile.
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
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)
|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)|
Conservation, Ecology & Research
Loss of habitat and genetic viability
Trampling by humans and livestock
Mineral and energy exploration and development
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.
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.