Abstract
The study on sporangial arrangement patterns in strobili of Selaginella species from Arunachal Pradesh, India aims to provide a morphological analysis of strobili in 20 species of Selaginella. The study recorded variations in the distributional patterns of sporangia in the strobili within and among the Selaginella species. It provides a detailed description of the position and features of strobili, the number and position of microsporangia and megasporangia per strobili, the shape, size and margin of sporophylls and the number of megaspores per megasporangium which are useful in taxonomic delimitation. We provided photo plates of strobili in 20 species of the genus, 16 patterns of sporangial arrangement and a table which includes sampling details along with statistical analysis based on the size of strobili and sporophylls.
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