The following Participating Institutions are custodians for this species in the CPC National Collection:
Red Butte Garden and Arboretum
Cincinnati Zoo & Botanical Garden
The conservation of Primula maguirei is fully sponsored.
Sylvia Torti contributed to this Plant Profile.
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
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)
|The estimated population size is 3000 individuals in 6 known locations. (USFWS 1990)|
Conservation, Ecology & Research
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).
Recreational rock climbing
Amateur horticultural collecting
(State of Utah Natural Resources 2002)
Environmental factors that govern the distribution of this species are not well understood, nor are the long-term
Boyack, A. 1988. Primula maguirei shows its splendor. 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.
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. Utahs 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.