| Each sporangial complex is born on a branch system that dichotomizes twice, with each resulting branch tip branching pinnately and ending in a sporangium. |
| Pharmacologic treatment has not been successful, probably because of the impenetrability of the sporangial wall. |
| More than 30 sporangial meiotic cells at late diplotene were counted. |
| The fully developed microsporangium consists of a mass of haploid pollen grains enclosed within the sporangial wall. |
| The genera are characterized by the sporangiophore and sporangial features and their relationship to and appearance of the rhizoid structures. |
| However, closer evaluation of sporangial shape shows clearly that there is more variation within the genus than was previously suspected. |
