Gebaeudemanagement

Eintrag vom: 24.03.2013.

00:00 Introduction 00:25 Ferns are ancient Plants 01:12 The Structure of a Fern 01:34 An Erect Rhizome 01:45 A laterally growing Rhizome 01:55 A Vertical Rhi...

 

Tree ferns are arborescent (tree-like) ferns that grow with a trunk elevating the fronds above ground level making them trees. Many extant tree ferns are members of the order Cyatheales to which belong the families Cyatheaceae (scaly tree ferns) Dicksoniaceae Metaxyaceae and Cibotiaceae.

 

What follows is a short primer on the biology of ferns starting at the beginning with how ferns first originated and evolved into the plants we see in the present making special note of some of the groups that went extinct along the way.

 

Fern class of several thousand species of nonflowering vascular plants that reproduce by spores. Ferns have true roots stems and complex leaves and constitute an ancient division of plants. Learn about their physical characteristics life cycle genetics evolutionary history and classification.

 

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Ferns have leaves called megaphylls that are more complex than the microphylls of clubmosses. Most ferns are leptosporangiate ferns that produce coiled fiddleheads that uncoil and expand into fronds. The group includes about 10 560 known extant species.

 

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