Lemmon’s holly fern (Polystichum lemmonii) COSEWIC assessment and status report: chapter 8

Limiting Factors and Threats

The most direct threat to Polystichum lemmonii is either mining exploration or forest road construction. The population is adjacent to an old gold mine. Ultramafic rock outcrops often attract mineral exploration and the rock outcrops could also be of use as a quarry for road building materials. Due to the ultramafic properties of the soils, introduced species are presently of no concern at this site.

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