I was hiking near Lake Chaplain on Sunday and found the strangest horsetail specimen I have ever seen. The specimen appeared to be a E. telmateia stem with both fertile and sterile characteristics. Specifically, it appeared to have a stem with branches (typically on sterile stems) and a strobilus (typically on fertile stems). Images of the specimen can be found here: https://www.inaturalist.org/observations/26702147
I have three questions that are uniquely relevant to this group.
I am very interested to hear thoughts from the iNat community about these questions! This observation has got me scratching my head and thinking about how this project can accommodate the diversity of real-world horsetail morphologies.
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U. of Hawaii documented something similar: http://www.botany.hawaii.edu/faculty/carr/equiset.htm
Nice research in finding the Hawaiian link.
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