Seaside bone (Hypogymnia heterophylla) COSEWIC assessment and status report: chapter 9

The special significance of Hypogymnia heterophylla is that it is an endemic species in North America and its restricted occurrence in Canada is at the northern limit of its range. This epiphytic species is restricted to the Pacific Northwest coastal areas of North America where it is most often found in open windswept early to intermediate seral shore pine forests (Figure 2).

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