Spriggan Sap

Found
Zweiglingsaft
 * One on a shelf in the Arch-Mage's Quarters at the College of Winterhold (respawns)
 * Two in the second floor of the Hall of Countenance at the College of Winterhold (respawns)
 * Sold by the various Merchants, including Arcadia, Frida and Zaria
 * Three samples found in each of Honeyside and Proudspire Manor (doesn’t respawn)
 * One on a shelf in the crafting room of Fort Dawnguard, only if you sided with the Dawnguard (respawns)
 * Ansilvund Excavation
 * Jorgen and Lami's House
 * Mistveil Keep
 * The Ragged Flagon
 * Soljund's Sinkhole
 * Tower of Mzark