K UEHARA   S KURITA   N SAHASHI   T OHMOTO   
AMERICAN JOURNAL OF BOTANY 78(9) 1182-1190 1991年9月
Spore wall morphogenesis of the microspore of Isoetes japonica was studied by transmission electron microscopy. The microspore wall consists of four layers: the perispore, outer exospore, inner exospore, and endospore. The perispore consists of el...