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Contribution to the embryology ofCalamintha umbrosa Benth.

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Proceedings / Indian Academy of Sciences

Abstract

The anther development confirms to the dicotyledonous type. The tapetal cells are binucleate, glandular and dimorphic. The pollen tetrads are tetrahedral and decussate. The pollen grains are shed at 2-celled stage. The development of embryo sac is of the polygonum type. A weak hypostase is present. The micropylar haustorium develops lateral diverticulum. The endosperm isab initio cellular and its development conforms to ‘stachys type’. The embryo development follows Mentha variation of onagrad type. The seed coat is 1-layered. The pericarp consists of 3 zones. The outer epidermis is non-mucilagenous. At maturity, the hypodermal layer of inner epidermis forms the main protective layer. Seed is endospermic.

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Author notes

  1. N K Dwivedi

    Present address: Mulberry Breeding and Genetics Section, Central Sericultural Research and Training Institute, 570 008, Mysore, India

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  1. Botany Department, University of Jodhpur, 342 001, Jodhpur, India

    N K Dwivedi

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  1. N K Dwivedi
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Dwivedi, N.K. Contribution to the embryology ofCalamintha umbrosa Benth.. Proc. Indian Acad. Sci. 95, 291–294 (1985). https://doi.org/10.1007/BF03053238

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  • DOI: https://doi.org/10.1007/BF03053238

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