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4,501 species in Indiana Dunes National Park
Chalybion californicum
Chara contraria
Chasmanthium latifolium
Chilacis typhae
Chlorencoelia versiformis
Chlorosplenium chlora
Chondrilla juncea
Chrysopilus ornatus
Cincinnatia integra
Cladonia ochrochlora
Cladonia ramulosa
Cladonia robbinsii
Clavulinopsis appalachiensis
Clavulinopsis aurantiocinnabarina
Clemmys guttata
Clitocybe robusta
Clostera apicalis
Clostera inclusa
Collybia cookei
Collybiopsis dichroa
Coltricia perennis
Comatricha pulchella
Condylostylus comatus
Conocephalum salebrosum
Coprinopsis variegata
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