Schematic drawing of two sporangia of Junggaria spinosa as they appear in fossil specimens. Based on Fig. 6 in Cai, C.-Y.; Dou, Y.-W. &amp; Edwards, D. (1993), "New Observations on a Pridoli Plant Assemblage from North Xinjiang, Northwest China, with Comments on Its Evolutionary and Palaeogeographical Significance", Geological Magazine 130 (2): 155–170, doi:10.1017/S001675680000982. Scale bar is 1 mm.
Own work
Peter coxhead