Would be useful to see Frost Lotus, Ice Thorn, Lichbloom, Adder's Tongue (mentioned above), and their respective drop zones. My herbalist has been in Borean Tundra and Howling Fjord with minor exposure to Grizzly Hills and some instances. However, he is already 450 herbalism.
A couple points:
-Lichbloom, Ice Thorn, Adder's Tongue, Gold Clover, Tiger Lily, and Telandre's Rose can be gathered from mobs in Nexus.
-Frost Lotus can be gathered from any Northern Herb (I've even gotten one from Gold Clover in the Fjord).
-Frost Lotus is a plant as well.