this post was submitted on 24 Jun 2025
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If you go out in a bog and look around, most of the plants there are angiosperms. The non-angiosperms are mainly mosses (capable of surviving on atmospheric deposition, not really producing the sorts of complex structures that can be adapted for carnivory like leaves and roots), ferns, and horsetails. "Why no carnivorous ferns?" seems like an interesting question but it's also kinda like "Why no flowering ferns?" Because you need structures (leaves, glandular trichomes, or roots) that can be exapted for a new purpose and flowering plants seem to have the most plasticity.
you forgot gymnosperms, aka conifers, gingkos, cycads.
Not really seeing the niche overlap there, as most carnivores are small, shallow rooted, and herbaceous. Gingkos are relicts, conifers tend to be woody, deep-rooted, and can't grow in pure peat, so there's probably less pressure to solve nitrogen deficiency. That leaves cycads, which do grow in swampy soils, but they haven't changed a whole lot in tens of millions of years.