I found them at the end of my holiday in a tropical country. The climate there allows development of sporangi allthrough the year. Ferns were abundant over there, and I was able to find many different variants. Back home it was fun to observe them with a fluorescence microscope.
Many differences in size, colour of radiated light, size of sori and how populated on the leafs. E.g. the sporangi in photo 6 were exclusively covering the outer edge of the soft finger shaped leafs.
Photo 1 to 3 show a not yet identified plant with long flat yucca-ish leafs. The sporangia were on the backside in a square pattern.
Photo 1 and 2 with (approximately) 7x objective and respectively the green and blue filter block. (merged from 2 stacks) Photo 3 the same but with 9x objective. The remaining pictures were also taken with the 9x. Photo 4 and 5 are from one of the ferns, you can see some sporangia cracked open. Photo 6 as previously mentioned, radiation colour more purple and blue. Excitation for all was ultraviolet.
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6.
That's it for today, more types in progress
Note: (In case you didn't know, the microscope I used for this thread is descibed here: http://www.photomacrography.net/forum/v ... hp?t=36484)
Regards,
Walter
Very nice set. 
