The Elder Scrolls IV: Oblivion/Nirnroots
From Faqs4Games.com, the free video game encyclopedia
How to find Nirnroots
Nirnroots are found near bodies of water and are also found in peoples homes as a decoration.
The easiest way to find a great deal of Nirnroots is to start outside Leyawiin in the south west corner and follow the waters edge north, this will take you past Leyawiin, past Bravil, to the Imperial City, keep following the outside edge and you will be going south, you will go along a few rivers to the east and back, just keep following the waters edge and you will get back past Leyawiin. Doing this and picking up all the Nirnroots you come across will get you nearly all 100 Nirnroots you will need.
But because there is a guide out there that specifically locates 101 Nirnroots, you can also use that, it is by Cerbius666 and you can find it on www.gamefaqs.com.
Seeking Your Roots
Once you have collected your first Nirnroot Plant you will be given this quest. Fast travel to 'Skingrad - West Gate' from there go east along the path, when you are able to go north up a little hill, take that path north, the first building you see to the north east is where you have to go, open the door to 'West Weald Inn'. Inside there is a door on the east wall, go in this door.
Follow the stairs down and you will be in a room with a high elf named Sinderion, talk to him and ask him about 'Nirnroot' after that ask him about 'Elixir of Exploration'. Now follow your quest marker out of Skingrad, then north to Shadelead Copse. Once you are there you should be able to find 3 Nirnroots. Now you just need to find 6 more, how you do this is up to you.
Once you have 10 you will be told to return to Sinderion, so follow your quest marker back to him. Once you're at him talk to him and ask him about 'Elixir of Exploration'. The Elixirs will take 24 hours for him to make. Return to him after you've killed the time and ask him about 'Elixir of Exploration' to get the weak version. You can buy more from him if you want to. Now you need 20 more for the next potion, so again, go find them how ever you can.
Once you have 20 you will be told to return to Sinderion, so follow your quest marker back to him. Once you're at him talk to him and ask him about 'Elixir of Exploration'. The Elixirs will take 24 hours for him to make. Return to him after you've killed the time and ask him about 'Elixir of Exploration' to get the moderate version. You can buy more from him if you want to. Now you need 30 more for the next potion, so again, go find them how ever you can.
Once you have 30 you will be told to return to Sinderion, so follow your quest marker back to him. Once you're at him talk to him and ask him about 'Elixir of Exploration'. The Elixirs will take 24 hours for him to make. Return to him after you've killed the time and ask him about 'Elixir of Exploration' to get the strong version. You can buy more from him if you want to. Now you need 30 more for the next potion, so again, go find them how ever you can.
Once you have 40 you will be told to return to Sinderion, so follow your quest marker back to him. Once you're at him talk to him and ask him about 'Elixir of Exploration'. The Elixirs will take 24 hours for him to make. Return to him after you've killed the time and ask him about 'Elixir of Exploration' to get the grand version. You can buy more from him if you want to. Now you need 30 more for the next potion, so again, go find them how ever you can.
While this quest is now complete, you can always bring Sinderion 10 Nirnrootr and sell them to him for 250 gold.