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Morphology Of Flowering Plants

Question
CBSEENBI11024953
Wired Faculty App

Ectophloic siphonostele is found in

  • Osmunda and Equisetum

  • Marsilea and Botrychium

  • Adiantum and Cucurbitaceae

  • Dicksonia and Maidenhair fern.

Solution

A.

Osmunda and Equisetum

Stele is a column containing vascular tissues which is surrounded by pericycle and separated from ground tissue by endodermis. Siphonostcle is medullated protostele or protostele with a central non-vascular pith. Leaf gaps are absent.

Siphonostelc is of two types: In Ectophloic siphonostele, central pith is surrounded successively by xylem, phloem, pericycle and endodermis. In amphiphloic siphonostele there is a central pith and xylem is surrounded on either side by phloem, pericycle and endodermis. It is found in Osmunda and Equisetum.

Some More Questions From Morphology of Flowering Plants Chapter

Explain with suitable examples the different types of phyllotaxy.

Define the following terms:

(a) aestivation

Define the following terms:

(c) placentation

Define the following terms:

(c) actinomorphic

Define the following terms:

(d) zygomorphic

Define the following terms:
(e) superior ovary

Define the following terms:
perigynous flower

Define the following terms:
epipetalous stamen

Define the following terms:

(a) Racemose and cymose inflorescence

Define the following terms:
(b) Fibrous root and adventitious root

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