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4,391 species in Cape Breton Highlands National Park
Polytrichum strictum
Potentilla norvegica
Pycnothelia papillaria
Pyganodon cataracta
Pylaisiadelpha tenuirostris
Pyrola americana
Racomitrium microcarpon
Reynoutria sachalinensis
Rhabdoweisia crispata
Rhizomnium appalachianum
Rhyacophila glaberrima
Rhytidiadelphus subpinnatus
Rugathodes aurantius
Rumex crispus
Salix discolor
Scapania irrigua
Scaphisoma rubens
Scirpus cyperinus
Scorzoneroides autumnalis
Sialis joppa
Sida crystallina
Smerinthus cerisyi
Sonchus asper
Stethophyma gracile
Sympetrum vicinum
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