The below mentioned article provides a note on the noeggerathiopsida. The class Noeggerathiopsida or the Noeggerathiales form a group of plants extremely peculiar and not yet fully known. Their affinities are rather uncertain. They have been placed within the Sphenopsida, within the Filicopsida and also between the Lycopsida and the Sphenopsida. But, the more general opinion is to consider them [...]
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 been included within a single [...]
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., Selaginella, Lycopodium, Lygodium, Gleichenia etc. [...]