leptosporangiate adjective 1noun 1forms 1 adjective1 •Having sporangia that were each formed from a single epidermal cell; of, pertaining to, or characteristic of ferns of this kind.[…]which being leptosporangiate cannot be closely related to Isoetes, the sporangia appear late in the history of the leaf. — 1900 noun1 •Such a fern formsleptosporangiates
