Figs. 167-172. Fossombronia longiseta (Austin) Austin. 167. OM micrograph of a mat of plants with multiple, elongate setae; scale bar = 1 mm. 168. OM micrograph of a single plant growing from a basal tuber (arrow);scale bar = 1 mm. 170. SEM micrograph of a shoot at the base of a caulocalyx showing a cluster of antheridia (an) posterior to the archegonia (ar); scale bar = 100 µm. 171. OM micrograph of a single plant with two caulocalyces (arrows); scale bar = 1 mm. 172. OM micrograph of two plants showing an immature sporophyte (left) and mature sporophyte with elongate seta (right); scale bar = 1 mm. Figs. 167, 168, 170 from California, Wheeler 330 (ABSH). Fig 169 from California, Wheeler 355 (ABSH). Figs. 171, 172 from California, Doyle 8931 (ABSH).

    Figs. 173-178. Fossombronia longiseta (Austin) Austin. 173. SEM micrograph of a plant with two caulocalyces (arrows) and archegonia (ar); scale bar = 100 µm. 174. SEM micrograph of a single caulocalyx showing the stipitate base, smooth body and lobed mouth; scale bar = 100 µm. 175. OM micrograph of a leaf; scale bar = 1 mm. 176. OM micrograph of elongate median leaf cells; scale bar = 10 µm. 177. OM micrograph of the apical part of the capsule wall; scale bar = 10 µm. 178. OM micrograph of spores and an elater; scale bar = 10 µm. Figs. 173 - 177 from California, Wheeler 330 (ABSH). Fig. 178 from the lectotype of F. longiseta, Bolander s.n. (MANCH).

    Figs. 179-161. Fossombronia longiseta (Austin) Austin. 179-181. SEM micrographs of distal spore walls, from a single capsule, showing variation from a lamellate to an echinate pattern; scale bar = 10 µm. 182. SEM micrograph of a spore showing the lateral view; scale bar = 10 µm. 183. SEM micrograph of the distal spore wall from the lectotype of F. hispidissima; scale bar = 10 µm. 184. SEM micrograph of the proximal spore wall; scale bar = 10 µm. Figs. 179 - 182, 184 from the lectotype of F. longiseta, Bolander s.n. (MANCH). Fig. 183 from the lectotype of Fossombronia hispidissima, Bolander 59(G).