What does cryptogam mean?
A cryptogam is a plant that reproduces by means of spores rather than seeds, a term embracing mosses, liverworts, ferns, horsetails, algae, fungi, and lichens. The name derives from Greek roots meaning 'hidden marriage', reflecting the fact that these organisms' reproductive processes were invisible to early botanists, unlike the conspicuous flowers of seed plants, which were called phanerogams. Linnaeus formalized the group as Cryptogamia in the eighteenth century, and Victorian naturalists studied these humble plants with enthusiasm, founding dedicated societies and journals. Modern science has dissolved Cryptogamia as a formal category, since its members — fungi and lichens especially — are not closely related and fungi are not plants at all. Nevertheless, 'cryptogam' survives as convenient descriptive shorthand in botany and ecology, particularly when referring to the flora of damp, shaded habitats where ferns and bryophytes flourish. Its antonyms include phanerogam and spermatophyte, the seed-bearing plants.
nounA plant that reproduces by spores rather than seeds, formerly classified in the artificial group Cryptogamia; the term covers mosses, liverworts, ferns, horsetails, algae, fungi, and lichens.
- A spore-producing plant (moss, liverwort, fern, horsetail, alga, fungus, or lichen), historically grouped in the taxon Cryptogamia as opposed to seed-bearing phanerogams.
"The damp ravine was a paradise for cryptogams, with mosses and ferns carpeting every shaded ledge."
"Victorian botanists devoted entire societies to the study of cryptogams — the mosses, ferns, and fungi that flower never at all."
"Because the old Cryptogamia lumped together organisms we now know are unrelated, modern botany treats 'cryptogam' as descriptive shorthand rather than a formal classification."
Standard plural; countable in ordinary usage, often treated collectively in ecological writing.
"Cryptogams dominate the forest floor in this cool temperate rainforest."
Linnaeus grouped ferns, mosses, algae, and even fungi into one catch-all 'flowerless' category — the cryptogams — simply because their reproduction was hidden from him; DNA later revealed fungi aren't plants at all.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cryptogam
Cryptogam comes from the Greek 'kryptos' (hidden) plus 'gamos' (marriage or union), so it literally means 'hidden marriage' — a reference to the concealed sexual reproduction of spore-bearing plants. The term was coined in the early eighteenth century and was popularized by Linnaeus, who used it to name his class Cryptogamia in his system of plant classification. It entered English botanical writing shortly afterward and remains in use as a descriptive label. Related words sharing the Greek root 'kryptos' include cryptic, cryptogram, apocryphal, and eucalyptus ('well-covered').
Related word forms
How cryptogam is actually used
Cryptogam is chiefly a technical or historical term, encountered in botany textbooks, natural history writing, and older literature rather than everyday speech. Because it describes a now-obsolete artificial grouping that mixed true plants with fungi, it is used descriptively today, not as a formal taxonomic label. The adjectival forms 'cryptogamic' and 'cryptogamous' appear mainly in scholarly contexts.
Easily confused with cryptogam
A cryptogram is a puzzle written in code or cipher, while a cryptogam is a spore-reproducing plant such as a moss or fern.