CPC Plant Profile: Maguire's Primrose
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Plant Profile

Maguire's Primrose (Primula cusickiana var. maguirei)

This shot shows pink flowers topping long, graceful stalks on this plant, growing out of the rock. Photo Credit: ©R. Delmatier
Description
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: Federally Threatened
  • Family: Primulaceae
  • State: UT
  • Nature Serve ID: 143121
  • Date Inducted in National Collection: 04/04/1991

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)

Participating Institutions
Updates
Nature Serve Biotics
  • 05/02/2017

A narrow endemic of Logan Canyon in Cache County, Utah. Using historical botanical species, no evidence of declines in numbers of populations or in the range of the species was found. Primula maguirei is most limited by the availability of suitable habitat (dolomitic cliffs and boulders with cool, moist microclimate). Threats include rock climbing activities, collecting, and potential highway improvements.

Sylvia Torti
  • 01/01/2010

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

Sylvia Torti
  • 01/01/2010

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

Sylvia Torti
  • 01/01/2010

None known.

Sylvia Torti
  • 01/01/2010

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

Sylvia Torti
  • 01/01/2010

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.

Sylvia Torti
  • 01/01/2010

Successful propagation of this species is critical.

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Photos
Nomenclature
Taxon Primula cusickiana var. maguirei
Authority (L.O. Williams) N.H. Holmgren & S. Kelso
Family Primulaceae
CPC Number 3620
ITIS 836304
USDA PRCUM
Common Names Maguire primrose | Maguire's primrose
Associated Scientific Names Primula maguirei | Primula cusickiana var. maguirei | Primula cusickiana subsp. maguirei
Distribution This species is only found in Logan Canyon, northern Utah. (USFWS 1985)
State Rank
State State Rank
Utah S1
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)

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).

Pollinators
Common Name Name in Text Association Type Source InteractionID

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