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Wood Lily - Lilium philadelphicum
State Rank Reason (see State Rank above)
Lilium philadelphicum has a patchy, but wide distribution in Montana, and is often found in specialized habitats. Observations in eastern Montana have not been made since the 1930's and 1940's. This species is vulnerable to extirpation in Montana because of its attractiveness, potential to be over-collected, and habitat requirements. Native lilies have rarely survived in gardens. Current information on known locations, especially in the eastern counties, is greatly needed.
- Details on Status Ranking and Review
ScoreG - 200,000-2,500,000 sq km (~80,000-1,000,000 sq mi)
Area of Occupancy
ScoreE - 26-125 4-km2 grid cells
Number of Populations
ScoreC - 21 - 80
Number of Occurrences or Percent Area with Good Viability / Ecological Integrity
ScoreC - Few (4-12) occurrences with excellent or good viability or ecological integrity
ScoreA - Very narrow. Specialist or community with key requirements scarce
ScoreC - Medium
CommentThreat categories include: Plant collecting (real) and road maintenance/development (potential).
Stems 20–60 cm. Leaves linear-lanceolate, 3–7 cm long. Flowers 1 to 3; tepals reddish with yellowish and black-spotted bases, elliptic, long-clawed, 5–7 cm long, spreading; stamens barely included. Capsule narrowly ovoid, 2–4 cm long (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
BC to QC south to ID, NM, IL and GA (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Threats or Limiting Factors
STATE THREAT SCORE REASON
Reported threats to Montana's populations of Wood Lily include impacts from livestock grazing and flower gathering by people (MTNHP Threat Assessment 2021). Some populations are grazed by livestock, but the scope and severity of impacts are currently unknown. Flower gathering by people negatively impacts populations where the showy inflorescence is easily seen along popular hiking trails.
- Literature Cited AboveLegend: View Online Publication
- Hitchcock, C. L., A. Cronquist, M. Ownbey, and J. W. Thompson. 1969. Vascular Plants of the Pacific Northwest. Part I: Vascular Cryptogams, Gymnosperms and Monocotyledons. Seattle, WA: University of Washington Press. 914 pp.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Britton, N. L. and A. B. Brown. 1913. An Illustrated Flora of the Northern United States, Canada, and the British Possessions. 2nd Edition in 3 Volumes. New York, NY: Charles Scribner's Sons. B13BRI01PAUS.
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