Comment on On trees...
BodyBySisyphus@hexbear.net 6 days ago
The genus Cornus is a huge middle finger to growth-form-based taxonomy. It contains dogwood trees and also bunchberry, an itty bitty herb that grows on the forest floor.
The first “trees” were also lycopods whose closest extant relatives are the club mosses, a name which gives you an idea of how big they get.
fossilesque@mander.xyz 6 days ago
We use a specific type of Lycopodium as a control group to calculate pollen counts in palaeoecology. It’s pollen is super distinct.
BodyBySisyphus@hexbear.net 5 days ago
That’s super neat. Is that little triangular bit at the top a germ pore or something else? It’s funny how you get one clade that takes what you’d think would be a really optimizable form like a spore or a pollen grain and takes a left turn with it. In fungi, Entolomas are really identifiable because their spores are pink and cube shaped.
Image
fossilesque@mander.xyz 5 days ago
The Y like structure comes from their formation in a sort of honeycomb cluster of 4. This structure makes them easy to break off from the host and also provides a weak point for germination. :) I wish I could differentiate fungal spores, I see a lot of them.
BodyBySisyphus@hexbear.net 5 days ago
Oof, I do not envy anyone trying to identify fungi through the fossil record. Color and fruiting body structure tend to play pretty big roles in ID because the spores themselves tend to be small and fragile, so except for a few genera that are known for highly ornamented spores it can be pretty challenging.