Botania is a tech mod themed around natural magic. The main concept is to create magical flowers and devices utilizing the power of the earth, in the form of Mana.
Botania is different in this mod pack, unlike other packs Blightfall has no room for the flowers the mod uses to spawn, therefore they must be found by exploring the land. A list of their locations can be found here. They are typically found around Scout locations.
Almost all of Botania is explained in the Lexica Botania, which requires translating but can be found in abundance.