Apothecary Parcels, released as part of patch 2.6.9, allow an alternative means to obtain alchemical reagents buy spending Tel Var Stones in Imperial City.
One player has posted some statistical data on 30 of the parcels they purchased and results are a surprising. The most common reagents were some of the most sought after reagents: Columbine, Lady Smock, Corn Flower, and Nirnroot. See data here (google docs).