Ectophloic siphonostele is found in...

Ectophloic siphonostele is found in

A

Adiantum and Cucurbitaceae

B

Osmunda and Equisetum

C

Marsilea and Botrychium

D

Dicksoni and Maidenhair fern

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The correct Answer is:

B

In ectophloic siphonostele central pith surrounded by xylem and phloem is external to xylem.
Ex. Equisetum, Schizaea, Osmunda.

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