Pteridium: Difference bn P. aquilinum and P. pinetorum ?

Looking at European observations of Pteridium in iNaturalist.org, I see that in the West all is P. aquilinum, and in the East, all is P. pinetorum - but I simply don't recognize any difference in the pictures.

Can anybody please explain how to distinguish them?

P. aquilinum: https://www.inaturalist.org/observations?place_id=67952&subview=map&taxon_id=52681

P. pinetorum: https://www.inaturalist.org/observations?place_id=67952&subview=map&taxon_id=841645

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Stained transverse section of a common bracken (Pteridium aquilinum) stem, under microscope, with normal and polarized light.
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πŸ‘€︎ u/el_Bosco1
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Elephant Hawk-moth ( Deilephila elpenor ) 33 photo focus stack of this awesome moth resting on the stalk of Pteridium aquilinum in a wooded area full of pinus sylvestris : )
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Stained details of the inside of a bracken fern (Pteridium aquilinum). The big cells (in red) transport water & provide structural support. Green cells store starch (energy). Pteridium aquilinum is found on every continent except Antarctica. ​ β€‹πŸ“· : Anatoly Mikhaltsov/Wikipedia via @sciencealert IG
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Bracken Fern (Pteridium aquilinum) under the dark canopy of DeVoto Cedar Grove, Idaho [3840x2560] [OC]
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πŸ‘€︎ u/RaddIce
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Bracken Fern (Pteridium aquilinum) under the dark canopy of DeVoto Cedar Grove
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πŸ‘€︎ u/RaddIce
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Bracken Fern (Pteridium aquilinum) fiddleheads coming up through spring bluebells; one of many incredible ferns native to coastal BC.
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Bracken [Pteridium aquilinum] [1600 x 1068][OC] flickr.com/photos/lorddex…
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πŸ‘€︎ u/Shamanic_miner
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Bracken Fern - Pteridium aquilinum [1024 x 685] flickr.com/photos/galacto…
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πŸ‘€︎ u/a_slow_burn
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A buddy of mine recently spotted this achlorophyllous bracken fern (Pteridium aquilinum) in Canada. Ghostly stunning. Photo Credit: Zachary Cava
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Bracken Fern (Pteridium aquilinum) under the dark canopy of DeVoto Cedar Grove, Idaho
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πŸ‘€︎ u/RaddIce
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Bracken Fern (Pteridium aquilinum) under the dark canopy of DeVoto Cedar Grove, Idaho
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πŸ‘€︎ u/RaddIce
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A buddy of mine recently spotted this achlorophyllous bracken fern (Pteridium aquilinum) in Canada. Ghostly stunning. Photo Credit: Zachary Cava
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Dune ferns enjoying the ocean breeze.
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SERIOUS: This subreddit needs to understand what a "dad joke" really means.

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

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Blind Girl Here. Give Me Your Best Blind Jokes!

Do your worst!

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I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies πŸ˜‚

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Pun intended.
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These aren't dad jokes...

Dad jokes are supposed to be jokes you can tell a kid and they will understand it and find it funny.

This sub is mostly just NSFW puns now.

If it needs a NSFW tag it's not a dad joke. There should just be a NSFW puns subreddit for that.

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