In this article we will discuss about Williamsonia. After reading this article you will learn about: 1. Occurrence of Williamsonia 2. External Features of Williamsonia 3. Reproduction. Occurrence of Williamsonia: Williamsonia belongs to family Williamsoniaceae of Bennettitales. It has been reported from Upper Triassic period but was more abundant in Jurassic. This was earlier discovered under the name Zamia gigas [...]
In this article we will discuss about Cycadeoidea. After reading this article you will learn about: 1. History of Cycadeoidea 2. Morphological Features of Cycadeoidea 3. Anatomy 4. Reproductive Organs 5. Microsporophyll 6. Gynoecium. Contents: History of Cycadeoidea Morphological Features of Cycadeoidea Anatomy of Cycadeoidea Reproductive Organs of Cycadeoidea Microsporophyll in Cycadeoidea Gynoecium of Cycadeoidea 1. History of Cycadeoidea: Cycadeoidea, [...]
Sporne (1965) discussed Palaeocycas as the only fossil genus belonging to Cycadaceae. Florin (1933) described the female sporangiophores of this genus belonging to Palaeocycas integer and its leaves belonging to Bjuvia simplex. The female sporangiophores of Palaeocycas integer were described from Upper Triassic rocks of Sweden. These sporangiophores are believed to have borne seeds. Its leaves resembled that of present [...]