In this article we will discuss about the affinities of ginkgo which belong to the family of class ginkgopsida. A. Relation to Ferns: The similarities between Ginkgo and ferns are: i. The leaves of Ginkgo shows striking similarity with Adiantum (maiden hair fern) in form, shape and venation and hence the name maiden hair tree […]
Affinities of Ginkgo | Class Ginkgopsida | Gymnosperms | Botany
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Affinities of Cycadeoids | Class Cycadopsida | Gymnosperms | Botany
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In this article we will discuss about the affinities of Cycadeoids which belong to the family of Class Cycadopsida. A. Relation to Ferns: Cycadeoids resemble ferns in the following characteristics: 1. The abundance of multicellular rementa on the plant body. 2. The presence of scalariform tracheids, large pith and direct leaf traces. 3. The pinnatified […]
Callistophyton Plants: Root and Leaves | Gymnosperms | Botany
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In this article we will discuss about the common parts of callistophyton plants. Stem: T.S. of Callistophyton stem shows a central angular parenchymatous pith surrounded by eustele. The stele is composed of a ring of 5 to 13 axial bundles (sympodia) forming leaf traces in 2/5 arrangement. Both mesarch and exarch primary bundles are reported, […]
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