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Genus :

EQUISETUM L.

Family :

Equisetaceae

Species of this Genus

Description


Semi-aquatic fern-allies.  Stem when monomorphic, without vascular collenchyma, or dimorphic usually   with vascular collenchyma, green in colour, annually grown. Stem branched with superficial stomata and outer common endodermis, branched with simple valleys having scattered stomata throughout the channel valleys. Stomata in the  single or double line on each side. Branch sheaths distinctly furrowed. Strobilous terminal on the main stem or at the end of the branches. Sporangia unilocular. Spores spherical,  green, homosporous.