Australian Tropical Ferns and Lycophytes - Online edition
5.3.6 Sorus visibility from upper surface of lamina/not visible
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![](../../images/features/5_3.6_sorus_visibility_from_upper_surface_of_laminanot_visible/thumbs/char_5_3_6_notvisible_sml.jpg)
Sori are not visible as raised domes, pimples or ridges in the upper surface of the lamina.
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