Herb

In World of Warcraft, herb can mean one of three things:
 * 1) A plant or part of a plant that usually serves as an ingredient in some profession (usually Alchemy) but sometimes has some other use, as with certain quest items and the reagents for a druid's rebirth spell.
 * 2) A plant resource node which can be harvested by those with the Herbalism profession to gain the above item or items.
 * 3) The act of harvesting such a resource with Herbalism. This is used primarily in reference to "herb skinning": the harvesting of herbs from the corpses of plant monsters.

Below is a table of all nodes that those with the herbalism profession may loot, the color code at different skill levels, what they yield, and where they are primarily found.

For a listing of what herbs are in each area see Herbs by Area.

Eastern Kingdoms and Kalimdor
Since patch 6.0.2, most classic herb nodes are accessible to anyone even with a skill of 1. However, low-skilled players will acquire petals, stems, leaves or brambles instead of the full item.
 * Note: Swiftthistle does not have nodes but is sometimes found in Briarthorn and Mageroyal nodes. Similarly, Wildvine does not have nodes but is sometimes found in Purple Lotus nodes.
 * The nodes for Arthas' Tears have been removed from the game.

Cataclysm
All Cataclysm nodes seem to have ~30% chance of having 1-4 Volatile Life and ~10% chance of having 1 Lifegiving Seed.