The only sterile tissue in either is the amphithecium, a single layer of tabular cells surrounding the mass of spore mother-cells. 7. Centrosomes are not present in ceils outside the antheridium nor ...

13. There is some additional sterilization of sporogenous tissue in the sporangium. 14. The divisions of the spore mother cells conform to the descriptions of JURANYI and TREUB. The reduced number of ...