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4,391 species in Cape Breton Highlands National Park
Salix pellita
Saperda inornata
Saponaria officinalis
Saxifraga paniculata
Schistidium trichodon
Schoenoplectus tabernaemontani
Scutellaria lateriflora
Securigera varia
Senecio sylvaticus
Senecio vulgaris
Slaterocoris breviatus
Sonchus oleraceus
Sphaeroderus stenostomus
Sphaerophorus globosus
Sphagnum majus
Sphagnum torreyanum
Spirorbis spirorbis
Spoladea recurvalis
Suillus ampliporus
Symmerista albifrons
Sympetrum costiferum
Sympetrum danae
Symphyotrichum cordifolium
Syndemis afflictana
Syngnathus fuscus
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