This illustration shows further development of the ascocarp: A, sectional view, showing the branches, s, derived from the germinating gametospore, that are forming numerous lateral branchlets. B, one of the branchlets enlarged, showing how it divides into cells which round off, forming the asci, as. C, ascospore. D, germinating ascspore.
Carlton C. Curtis, Nature and Development of Plants (New York: Henry Holt Company) 244