Thanks Nyx (better late than never, huh )! Its always nice to see a fellow Alchemist!  I have compiled a few other Alchemy-related articles, they are linked on my page if you decide to check them out (shameless self-promotion )

I'de like to learn more about Crimson Nirnroot because when I used it mixed with Skeever tail, it had a massive damage multiplier (26 points of poison damage) while regular nirnroot only did a bare minimum (9 points of poison damage). Great job on the article also! I really wish there was a book in skyrim that listed ALL ingredients and a short description of them :P its too tedious to go google the list.

Ha! I think in-game book will be even more tedious with all the page turning...  Regarding Crimson Nirnroot all we have is Sinderion's journal. 

My initial research seems to indicate that the crimson nirnroot has a similar affinity for moisture as the garden variety, but also maintains some sort of symbiotic relationship with the enormous fungi that inhabits Blackreach. It's my guess that the fungi itself is a source of water, absorbing it from the moist subterranean air like a sponge. This provides the ideal environment for the nirnroot to grow.

My guess is that this symbiotic relationship with fungi allows it to be more potent in poisons.

If you want to learn more about regular Nirnroot, The Nirnoot Missive is your best bet 

Thanks Vaz, that article was very interesting to read! And also, if the crimson nirnroot grows in Blackreach because of these special mushrooms, whynot it grow in other places that have these special mushrooms? As the article said, the nirnroot adapted to the altered ash salt soil so maybe Blackreach might have some specially enriched soil there.

What I figured out about Nirnroot is that it's highly adaptive. Regular ash soil is not enough to make Crimson Nirnroot as there is none on the Solstheim. But there are giant Nirnroots there... I think it's a combination of factors like the temperature, humidity, those mushrooms (the only other places where I saw those big mushrooms were the Forgotten Vale caves, but they are on high attitude and it may impact the growth). There can also be the presence of Elder Scroll. You see, everything on Nirn is inherently magical, maybe the proximity of such a powerful magical item had an impact on Nirnroot...