Summary
Nodes and internodes ofSolanum nigrum L. have been studied in serial transverse sections. The vascular cylinder of the internode consists of eleven bundles. The “flower-shoot” develops as an outgrowth of the main axis and three axial bundles form its vascular trace. The original eleven bundles of the internode are restored immediately above the divergence of the flower-shoot (inflorescence).
The origin and vascular supply of the leaf at the node show that it is alocal appendage like all normal leaves.
The primary branch is extra-axillary. It originates from the node as a protuberance, being supplied by 2 bundles. The vascular supply to the undeveloped bud is not exactly like that of a normal bud.
From the nature of the anatomical evidence presented in this paper the axis is monopodial. The inflorescence axis, and the leaf, branch and bud at the node are true appendages of the main axis.
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Communicated by Prof. G. P. Majumdar,f.a.sc.
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Fattah, Q.A. Studies on the morphology of the axis ofSolanum nigrum (Solanaceae) on the evidence of the internodal and nodal anatomy. Proc. Indian Acad. Sci. 42, 39–46 (1955). https://doi.org/10.1007/BF03051513
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DOI: https://doi.org/10.1007/BF03051513