Morphology of Marsilea Systematic position Kingdom : Plantae - CEC

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Fig. 2 Dichotomously branched and petiolate leaves of Marsilea sp. At the base of the petiole many bean-shaped or oval and stalked sporocarps develop (Fig. 3). Fig. 3 Bean-shaped or oval and stalked sporocarps at the base of petioles in Marsilea sp.
Anatomy of Marsilea Rhizome (Stem) Epidermis is single-layered, made up of compactly arranged thick- walled cells. Cortex is differentiated into three regions, viz. outer cortex, the middle cortex and the inner cortex: a. outer cortex is aerenchymatous, one to several cells in thickness, sometimes also consists of tannin cells, b. middle cortex consists of sclerenchymatous tissue filled with air cavities arranged in the form of ring, and c. inner cortex is solid tissue of several cells in thickness. The inner layer of inner cortex is parenchymatous, filled with starch, while outer region of inner cortex is sclerenchymatous in nature. The vascular cylinder is siphonostele; limited externally and internally by endodermis, hence called outer endodermis and inner endodermis, respectively. The siphonostele is medullated. The xylem is in the form of ring. Phloem is present on both sides of xylem. Such a stele is called amphiphloic siphonostele. The deposition of the several tissues from inwards is outer endodermis, outer pericycle, outer phloem, xylem, inner phloem, inner pericycle and inner endodermis (Fig. 4).
Page 1 and 2: Morphology of Marsilea Marsilea, co
Page 3: Root: The primary root formed on th
Page 7 and 8: Leaflet Fig. 5 Marsilea:Transverse
Page 9 and 10: Vascular bundle lies within the end
Page 11 and 12: Fig. 8 Marsilea: different modes of
Page 13 and 14: cell for the second sporocarp. This
Page 15 and 16: its development. The outer cell of
Page 17 and 18: gametophyte, while prothallial cell
Page 19: produced within the fruit body, the

Morphology of Marsilea Systematic position Kingdom : Plantae - CEC

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