Archive | Gymnosperm

Learn about the comparison of habit and anatomy of members of Lyginopteridaceae, Medullosaceae and Cycadales (Based on Bierhorst, 1971): Comparison # Lyginopteridaceae: 1. Lyginopteridaceae are relatively large and fern-like. 2. Lyginopteridaceaes stems are weak, aerial and well- branched. 3. Leaves of lyginopteridaceae are bi-pinnate or tri-pinnate, large; ultimate leaf units dissected. 4. In Lyginopteridaceae circinate vernation is seen. 5. In [...]

Learn about the comparison between Male Cone of Cycas and Male Cone of Pinus. Comparison # Male Cone of Cycas: 1. Rare and develop only on male plants. Cycas is dioecious. 2. Cycas is terminal in position. 3. Cycas is  usually produced singly on a plant. 4. Each male cone is oval or conical in shape in cycas and very [...]

The upcoming discussion will update you about the difference between Cycadeoideaceae and Williamsoniaceae. Difference # Cycadeoideaceae: 1. Cycadeoideaceae is a family of younger and advanced members of Bennettitales. 2. Cycadeoideaceae is silicified and well-preserved. 3. Trunks of members were ovoid or short, columnar and had an armour of leaf bases in cycadeoideaceae. 4. A part of the inflorescence remained partially [...]