Tag Archives: Cryptogams

Introduction to Pteridophyta

The word cryptogams is a synthesis of two Greek terms kruptos meaning ‘hidden’ and gamos meaning ‘wedded’. This single term encompasses all plants that reproduce by means of spores and, do not produce seeds. The algae, fungi, bryophytes and pteridophytes are all cryptogams. The pteridophyta are treated as vascular cryptogams …

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Classification of Pteridophytes

The term Pteridophyta was first coined by Haeckel. Eichler (1883) divided the plant kingdom into Cryptogamia and Phanerogamia. The Cryptogamia was further divided into Thallophyta. Bryophyta and Pteridophyta. Engler (1909) included the Bryophyta and Pteridophyta under Embryophyta. Due to discovery of the fossil plants, the classification of Pteridophytes has undergone …

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Origin of Pteridophytes

They are the earliest known vascular plants which originated in the Silurian period (400 million years ago) of Palaeozoic Era and subsequently diversified and formed the dominant vegetation on earth during Devonian to Permian period. There are controversies regard­ing their origin and evolution. There are two broad theories about their …

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Telome Theory

A telome is defined as “branch having no leaves but dichotomous branching at either apex or at base or both” i.e., it is the point of the most distal dichotomy to the tip of a branch. The connecting axes between dichotomies are called mesomes. Functionally, telomes are of two types …

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