In this article we will discuss about the classification of psilophytopsida. The Psilophytopsida comprise of the fossilised ancient Silurian-Devonian order Psilophytales. The discovery of the different genera from such wide places as Canada, Scotland, Europe and Australia shows that these plants were of world-wide distribution in those days. The Psilophytopsida and the living Psilotopsida have […]
Classification of Psilophytopsida | Plants
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Stelar Organisation in Vascular Plants (With Diagram)
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In this article we will discuss about the two principal types of stelar organisation in vascular plants: 1. Protostele 2. Siphonostele. Type # 1. Protostele: It is the simplest and most primitive type of stele. The vascular cylinder consists of solid core of xylem surrounded by phloem, pericycle and endodermis. There is no pith e.g., […]
Essential Features of Ferns | Plant Kingdom
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The following points highlight the nineteen essential features of ferns. 1. Ferns are seedless vascular plants of humid tropics and temperate areas. Some ferns live under sub-arctic conditions as well. 2. They constitute the largest living group of primitive vascular plants with over 10,000 species. Ferns once dominated the earth in carboniferous period (about 300 […]
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