There are many systems of classifications for Gymnosperms in the literature. In the previous post, we discussed the Chamberlain’s System of Classification of Gymnosperms. In this post, we discuss the Sporne’s System of Classification of Gymnosperms (1965). We will also discuss the characteristics of different Classes and Orders in the […]
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Economic Importance of Gymnosperms
The Gymnosperms are with high economic importance to mankind. For easy understanding, the economic importance of Gymnosperms can be categorized in the following heads: Economic Importance of Gymnosperms Food Value Medicinal Value Timber Value Source of Oil Industrial Value Ornamental Value Other Uses (1). Food Value Ø Cycads are a […]
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Caytoniales General Characteristics
What are Caytoniales? Ø Caytoniales were a small group of extinct Gymnospermic plants. Ø First described by Hamshaw Thomas in 1925 from the late Triassic period. Ø Caytonia is a berry-like cupules with numerous small seeds. Examples of Caytoniales Ø Leaves: Sagenopteris Ø Microsporophylls: Caytonanthus Ø Megasporophylls: Caytonia and Gristhorpia […]
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Glossopteridales and Glossopteris- General Characteristics
Glossopteridales and Glossopteris Ø Glossopteridales included an extinct group of seed plants (Gymnosperms). Ø They were originated during the Permian period on the Gondwana Continent. Ø They became the dominant vegetation in the Permian period. Ø They extinct completely by the end of the Triassic period. Ø The order name […]
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Pteridospermales PPT
Pteridospermales PPT: What are Pteridospermales or Cycadofilicales? Geological Horizon / Origin of Pteridospermales, Who Discovered Pteridospermales? What are the Characteristics of Pteridospermales, Morphology of Pteridospermales, Anatomy of Pteridospermales, Reproduction of Pteridospermales, Classification of Pteridospermales, Affinities of Pteridospermales, Examples of Pteridospermales, Similarities between Pteridospermales and Pteridophytes (Ferns), Similarities between Pteridospermales and […]
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