In this image, the tissue has been cleared making the spores visible through the sporangial wall. Two of the sporangia contain 1-4 large megaspores. Two of the sporangia contain 1-4 large megaspores. The remaining sporangia contain hundreds of microspores.
About The Author
I am particularly interested in macroevolutionary patterns and characters that diagnose large clades of ferns and lycophytes. My field work is centered in Mexico, Colombia, and Papua New Guinea. I am based in the Pringle Herbarium (VT) at the University of Vermont. If you have any ferns that you want identified, please send them to me!
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Once more unto the breach, dear friends: Resolving the origins & relationships of the Pellaea wrightiana hybrid complex (new #AJB reseach by Michael Windham, Layne Huiet, Jordan Metzgar, Tom Ranker, George Yatskievych et al) https://bsapubs.onlinelibrary.wiley.com/doi/10.1002/ajb2.1850 #botany #ferns @wileyplantsci
A great day doing a comprehensive Asplenium septentrionale count together with @NatResWales staff. Some positive site actions have already been done, and a good discussion on a management plan to look after this very special site. @FernBPS @fossilplants #FernFriday @cofnod3