cryptogam
noun
cryp·to·gam ˈkrip-tə-ˌgam 
: a plant or plantlike organism (such as a fern, moss, alga, or fungus) reproducing by spores and not producing flowers or seed
cryptogamic
ˌkrip-tə-ˈga-mik
adjective or less commonly cryptogamous
krip-ˈtä-gə-məs
Example Sentences
Recent Examples on the Web There is a huge potential in alternative materials sourced from unconventional, undervalued, small species like cryptogams, bacteria, and fungi. 
Charles Curkin, ELLE Decor, 22 Sep. 2019
Charles Curkin, ELLE Decor, 22 Sep. 2019 Word History
Etymology
borrowed from French cryptogame "cryptogamous, cryptogam" (after Cryptogamia, Linnaean group of non-seed-bearing plants), from crypto- crypto- + -game -gamous
First Known Use
1799, in the meaning defined above
Medical Definition
cryptogam
noun
cryp·to·gam ˈkrip-tə-ˌgam
: a plant or plantlike organism (as a fern, moss, alga, or fungus) reproducing by spores and not producing flowers or seed