TY - JOUR T1 - SPORE WALL ULTRASTRUCTURE IN THE EARLY LYCOPSID LECLERCQIA (PROTOLEPIDODENDRALES) FROM THE LOWER DEVONIAN OF NORTH AMERICA: EVIDENCE FOR A FUNDAMENTAL DIVISION IN THE LYCOPSIDS JO - AM J BOT PY - 2009/10/01 AU - Wellman CH AU - Gensel PG AU - Taylor WA ED - DO - DOI: 10.3732/ajb.0800422 VL - 96 IS - 10 SP - 1849 EP - 1860 Y2 - 2024/12/22 ER -