Fig. 6. Chara arnhemensis from the isotype specimen R.Specht A21 in Charophytes of Australia's Northern Territory - I. Tribe Chareae

Fig. 6. Chara arnhemensis from the isotype specimen R.Specht A21 (MEL). (a) Axis and branchlets of whole shoot, scale bar: 10 mm. (b) Section of axis with fertile branchlet whorl, scale bar: 1 mm. (c) Apex of a shoot, scale bar: 1 mm. (d) Transverse section of axis, scale bar: 100 µm. (e) Fertile branchlet with oogonia, antheridia, bracteoles and bract cells, scale bar: 1 mm. (f) Longitudinal view of axis with 2× cortication and long spine cells, scale bar: 1 mm. (g) Whorl of branchlets viewed from above, showing gametangia at the first branchlet nodes, scale bar: 1 mm. (h) Scanning electron micrograph (SEM) of whole oospore with 7 or 8 striae (damaged during preparation), scale bar: 50 µm. (i) SEM of felted, porate fossa wall, scale bar: 2 µm.