The structure of the pod in two species ofProsopis
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The structure of the stipe and basal, middle and apical regions of the pod is described. The older stipe shows secondary growth as in a dicotyledonous stem. The stipe at its junction with the valves shows three vascular bundles, one large and two small, arranged in a triangular manner, with 3–5 lateral bundles inProsopis juliflora. The mature pericarp ofP. cineraria has one dorsal and two ventral vascular sutural bundles, but inP. juliflora there is a pair of vascular bundles in each suture. The valvular structure can be distinguished into one layered epicarp, multilayered mesocarp and few to many layered endocarp. The outer mesocarpic layers and all endocarpic layers are sclerenchymatous inP. juliflora but only the endocarpic layers are collenchymatous inP. cineraria. Within the circumscription of structural types of pod described by Fahn and Zohary (1955), theTrifolium type (form d) is found inP. cineraria and theCyanophyllum type inP. juliflora. Taxonomic importance of anatomical characters is brought to light to separate the two taxa.
KeywordsProsopis pod structure taxonomic significance
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- Fahn A and Zohary M 1955 On the pericarpial study of the legumen, its evolution and relation to dehiscence;Phytomorphology 5 99–111Google Scholar
- Jensen W A 1962Botanical histochemistry, (San Fransisco: Freeman)Google Scholar
- Rangayya S and Shah G L 1984 Pericarpial structure inNeptunia;Acta Bot. Indica 12 50–56Google Scholar
- Shah G L, Rangayya S and Kothari I L 1983 Structure and development of pod ofCalliandra tweedii Bth;Flora 173 469–477Google Scholar
- Shah G L and Rangayya S 1983 Structure of the pericarp ofLeucaena leucocephala de Wit;Feddes Rep. 94 649–656Google Scholar
- Shah G L and Rangayya S 1984 Studies on the pericarp structure inDesmanthus virgatus Willd;J. Pl. Anat. Morphol 1 31–38Google Scholar