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Morphological and anatomical studies in helobiae

III. Vascular anatomy of the node and flower of Najadaceae

  • Published:
Proceedings / Indian Academy of Sciences

Summary

In the present investigation vascular anatomy of the node and flower of three species ofNajas—N. graminea, N. flexilis, andN. guadalupensis—have been studied. The leaves are one-traced in all the three species. InN. graminea although both the staminate and pistillate flowers appear to be subtended by the lowermost leaf of a node but the behaviour of vascular tissue shows that they are terminal on a branch system.

The male and female flowers ofNajas are represented by a single stamen and pistil respectively and are enclosed in a bottle-shaped spathe. InN. graminea the staminate flower is nacked. The vascular supply of gynoecium consists of a single bundle which gives off a very small dorsal trace inN. flexilis before entering the base of the solitary ovule which is described as basal. It appears that the so-called basal ovule inNajas too as in many other cases is a derived one. The presence of two stigmas gives some indication towards the pseudomonomerous and bicarpellary nature of the gynoecium.

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Authors and Affiliations

  1. School of Plant Morphology, Meerut College, Meerut

    V. Singh

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  1. V. Singh
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Communicated by Professor V. Puri,f.a.sc.

Research contribution No. 66 from the School of Plant Morphology, Meerut College, Meerut.

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Singh, V. Morphological and anatomical studies in helobiae. Proc. Indian Acad. Sci. 61, 98–108 (1965). https://doi.org/10.1007/BF03052090

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  • DOI: https://doi.org/10.1007/BF03052090

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