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Large-flowered woolly meadowfoam

Photo of Large-flowered woolly meadowfoam (USFWS)

Scientific name: Limnanthes pumila spp. grandiflora  

Status: Endangered

Critical Habitat: Designated

Listing: Large-flowered woolly meadow foam was listed as endangered in 2002. Critical habitat was designated in July 2010.

Potential Range Map 

  • Description and Life History

    Large-flowered woolly meadowfoam is an annual species in the meadowfoam family (Limnanthaceae). Plants measure 5 to 15 centimeters (2 to 6 inches) tall and pubescence is sparse on the stems and leaves. The flowers, especially the calyx (set of outermost flower leaves), are pubescent. Flowering typically occurs from April through May.

    This species is vegetatively similar to L. floccosa var. bellingriana. It is distinguished from other species of Limnanthes by the woolly calyx pubescence and from other subspecies of L. floccosa by the two lines of hairs on the petal claws, the sparse pubescence of the stems and leaves, and the larger corolla.

    Habitat

    Woolly meadowfoam occurs at the edge of vernal pools at elevations of 375 to 400 meters (1,230 to 1,310 feet), generally near the wetter, inner edges as opposed to the drier, outer fringes which harbor the sympatric ssp. floccosa. Associated species include small-flowered lupine (Lupinus micranthus), poverty clover (Trifolium depauperatum), and least mouse-tail (Myosurus minimum).

    Reasons for Decline

    Industrial, commercial, and residential development, road and power-line construction and maintenance, livestock grazing, agricultural conversion, weed competition, mowing, and roadside spraying have all contributed to the decline of this species.

    Range

    The large-flowered woolly meadowfoam is known to occur in the Agate Desert region of Jackson County in southwestern Oregon on land owned by Jackson County, Oregon Department of Fish and Wildlife, the City of Medford, and private individuals.

    Conservation Measures 

    Large-flowered woolly meadowfoam occurs on lands managed by the U.S. Bureau of Reclamation, the Oregon Department of Transportation, the Oregon Department of Fish and Wildlife, and The Nature Conservancy. These agencies and organizations protect the species and manage their lands to benefit the species’ continued existence.

    References and Links

    U.S. Fish and Wildlife Service. 2002. Determination of Endangered Status for the Plants Lomatium cookii(Cook's lomatium) and Limnanthes floccosa ssp. grandiflora (Large-Flowered Woolly Meadowfoam) from Southern Oregon. Federal Register 67:68004-68015.

    U.S. Fish and Wildlife Service. July 28, 2009. Endangered and Threatened Wildlife and Plants; Proposed Designation of Critical Habitat for Limnanthes floccosa ssp. grandiflora (Large-Flowered Woolly Meadowfoam) and Lomatium cookii (Cook’s Lomatium). Proposed Rule. Federal Register 74, No 143. U.S. Fish and Wildlife Service. Region 1. Portland, Oregon. pp. 37313 – 37392.

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