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Which one of the following is a vascular cryptogam?
A
$Cedrus$
B
$Equisetum$
C
$Ginkgo$
D
$Marchantia$
Detailed Solution
Cryptogams are plants that do not produce seeds (algae, bryophytes and pteridophytes).
Pteridophytes are the first terrestrial plants to possess vascular tissues, xylem and phloem, but they reproduce by spores; they are therefore called vascular cryptogams.
$Equisetum$ (horsetail) is a pteridophyte.
$Cedrus$ and $Ginkgo$ are gymnosperms, which are seed plants (phanerogams).
$Marchantia$ is a liverwort (bryophyte), a non-vascular cryptogam.
Hence the vascular cryptogam is $Equisetum$.
Pteridophytes are the first terrestrial plants to possess vascular tissues, xylem and phloem, but they reproduce by spores; they are therefore called vascular cryptogams.
$Equisetum$ (horsetail) is a pteridophyte.
$Cedrus$ and $Ginkgo$ are gymnosperms, which are seed plants (phanerogams).
$Marchantia$ is a liverwort (bryophyte), a non-vascular cryptogam.
Hence the vascular cryptogam is $Equisetum$.