• Plate I

     

    Figs. 124-129. Fossombronia foveolata Lindb. 124. OM micrograph of a typical patch of plants, showing the leaf stance and a single, mature sporophyte (arrow); scale bar = 1 mm. 125. SEM micrograph of a vegetative branch; scale bar = 100 µm. 126. SEM micrograph of a plant with spatially separated gametangia, antheridia (an) towards the base and archegonia (ar) towards the apices; scale bar = 100 µm. 127. OM micrograph of a fertile plant with two long stipitate caulocalyces (arrows); scale bar = 100 µm. 128. OM micrograph of a leaf; scale bar = 100 µm. 129. OM micrograph of median leaf cells; scale bar = 10 µm. Fig. 124 from Arkansas, Bray 250 (ABSH). Fig. 125, 126, 128 from the lectotype of F. foveolata, Lindb. s.n. (H-SOL). Figs. 127, 129 from Illinois, Bray 500 (ABSH).

     

  • Plate II

     

    Figs. 130-135. Fossombronia foveolata Lindb. 130. SEM micrograph of a mature caulocalyx of F. foveolata, showing the stipitate base; scale bar = 100 µm. 131. OM micrograph of inner capsule wall; scale bar = 100 µm. 132. OM micrograph of a spore and elaters of F. foveolata; scale bar = 10 µm. 133. OM micrograph of mature spores with some remaining in tetrads; scale bar = 10 µm. 134. SEM micrograph of the distal spore wall from the lectotype of F. foveolata; scale bar = 100 µm. 135. SEM micrograph of the proximal spore wall from the lectotype of F. foveolata; scale bar = 10 µm. Fig. 130 from Illinois, Bray 500 (ABSH). Fig. 131 from Stotler & Crandall-Stotler 3947 (ABSH). Figs. 132, 134, 135 from the lectotype of F. foveolata, Lindb. s.n. (H-SOL). Fig. 133 from Illinois, Bray 600 (ABSH).

     

  • Plate III

     

    Figs. 136-141. Fossombronia foveolata Lindb. 136. SEM Micrograph of the distal spore wall; scale bar = 10 µm. 137. SEM micrograph of the proximal spore wall; scale bar = 10 µm. 138-141. SEM micrographs of the distal spore walls of F. foveolata, showing typical variation among populations; scale bar = 100 µm. Fig. 136, 137 from Illinois, Stotler & Crandall-Stotler 249 (ABSH). Fig. 138, 139 from the lectotype of F. foveolata, Lindb. s.n. (H-SOL). Fig. 140 from Texas, Stotler & Crandall-Stotler 4007 (ABSH). Fig. 141 from Michigan, Steere s.n. (ABSH).