Jarrin Root is a rare plant unique to the island of Stros M'Kai. It is extremely toxic, and even small amounts when consumed will result in death unless an antidote is administered in time. For this reason, it is highly prized for use as a poison. The plants' toxin kills by dissolving the stomach lining and then spreading from there. Reports vary on severity of the Jarrin Root, in some cases death happens almost instantaneously after consumption, while others report that death takes much longer to occur. When dried, the root can stored for a long time without it losing its potency.
Jazbay is a sprawling, low growing plant most commonly found in the volcanic tundra of Eastmarch. The plant produces grapes known for their flavor and acidity. The grapes were once reserved only for emperors due to their exceptional flavor, and picking them was considered treason. Growers in Skyrim were successful in improving the survivability of the plant, but at the cost of the taste. It is no longer illegal to pick the grapes, although harvesting them in large amounts is still frowned upon by the law. The acidity of the grapes makes them a perfect fertilizer for nirnroot, and they are highly useful to alchemists.
Juniper are stocky silvery trees, common throughout The Reach region in Skyrim, which produce a berry often used to enhance the flavor of mead. Another variety can be found in the Alik'r Desert, where its leaves are used in medicines and certain Ash'abah rituals.
Jute is a fibrous plant commonly used for making simple clothing.