leptosporangiate

1. not comparablebiologyHaving sporangia that were each formed from a single epidermal cell; of, pertaining to, or characteristic of ferns of this kind.

   Most of his material, which includes a variety of leptosporangiate species, was obtained from greenhouses.

   1922, John Merle Coulter, Sir Humphry Davy, M.S. Coulter, The Collected Works of Sir Humphry Davy: Discourses Delivered before the Royal Society: Elements of Agricultural Chemistry, Part 1, page 264

   2 more examples

   […]which being leptosporangiate cannot be closely related to Isoetes, the sporangia appear late in the history of the leaf.

   1900, Robert Wilson Smith, Structure and Development of Sporangia and Sporophylls of Isoetes, page 330

   In fact, it seems that in the Primary rocks the distinctive Leptosporangiate annulus was at least rare, if it existed at all.

   1908, Frederick Orpen Bower, The Origin of a Land Flora, page 639

plural leptosporangiates

1. Such a fern