While attempting to make stable withering arcanium tincture in my house, was not able to make the charge because the Ancient Treant Wood was not on the merchant. Treant wood and Wizened wood are available. Suspect Ancient Treant wood was mistakenly removed because it says 'ancient', but this is not a dropped component like Ancient Lich Tooth, Ancient Crushed Focus Stone, etc which were removed in favor of Phoenix Feather bought materials; it should be put back on the Poison, Potion, and Tincture merchant.