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  • Species Profile for Maguire primrose (Primula maguirei)
Map of Species occurrence
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Maguire primrose (Primula maguirei)

Federal Register | Recovery | Critical Habitat | Conservation Plans | Petitions | Life History

Listing Status:   


General Information

Primula maguirei is a perennial, herbaceous plant 50-100 millimeters (mm) (2-4 inches (in.)) high, with showy reddish-lavender flowers. Leaves are oblong and 50 mm (2 in.) long and 12 mm (0.5 in.) wide. P. maguirei has two types of flowers, the pin and thrum—this is referred to as heterostyly (Davidson and Wolf 2009). On the pin form flower, the female reproductive organs (pistil—produces ovules which become seeds) are higher than the male reproductive organs (stamen—produces pollen). The thrum form is the opposite (Davidson and Wolf 2009).

Current Listing Status Summary
Status Date Listed Lead Region Where Listed
08/21/1985 Mountain-Prairie Region (Region 6)

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
10/06/2008 73 FR 58261 58262 5-Year Reviews of Three Wildlife Species and Eight Plant Species in the Mountain-Prairie Region
04/13/1984 49 FR 14771 14774 Proposal to Determine Primula maguirei (Maguire Primrose) to be Thr. Species; 49 FR 14771-14774
08/21/1985 50 FR 33731 33734 Final Rule to Determine Primula maguirei (Maguire Primrose) to be Thr. Species; 50 FR 33731-33734

» Recovery

Current Recovery Plan(s)
Date Title Plan Action Status Plan Status
09/27/1990 Maguire Primrose Final Recovery Plan View Implementation Progress Final
Other Recovery Documents
Date Citation Page Title Document Type
10/06/2008 73 FR 58261 58262 5-Year Reviews of Three Wildlife Species and Eight Plant Species in the Mountain-Prairie Region
  • Notice 5-year Review, Initiation
Five Year Review
Date Title
08/18/2012 Primula maguirei (Maguire primrose) 5-Year Review

» Critical Habitat

No critical habitat rules have been published for the Maguire primrose.

» Conservation Plans

No conservation plans have been created for Maguire primrose

» Petitions

» Life History

Habitat Requirements

Primula maguirei occurs on cool, moss-covered dolomite cliff tops, notches and boulders where some soil has accumulated. The species may be physiologically dependent on the calcium and magnesium carbonates within its soil substrate. Generally, the species occurs on north facing cliffs, with distribution limited by favorable temperature and moisture microhabitat conditions (FWS 1990). Snowmelt is likely an important source of moisture due to the extent of spring seepage present in the cliff habitat (IHI Environmental (IHI) 1995).

Reproductive Strategy

The different lengths of the pin and thrum flowers are adapted for pollination by different pollinators or different body parts of the same pollinator (Davidson 2010). These flower forms thus promote outcrossing (reproducing with non-related individuals) through sexual reproduction (Darwin 1877 in Bjerregaard and Wolf 2008). Bees, moths, and hummingbirds pollinate Primula maguirei flowers (Davidson 2010). Primula maguirei also can reproduce asexually, using underground rhizomes or horizontal plant stems to produce new shoots. Rhizomes allow storage of water in times of drought. This clonal growth pattern (genetically identical individuals growing together) allows recovery after periods of dormancy, such as during drought conditions (Kelso et al. 2009). The clonal nature of this species also makes it difficult to identify individual plants in the field (Sibul 2006).

» Other Resources

NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.