The Dew Nettle is an easily overlooked plant. It's leaves are tri-form and have a slick and glossy appearance. The plant produces small black berries that are moderately poisonous, and small blue flowers that have a slightly bitter smell.
Dangerous When Wet
The Dew Nettle is normally a safe plant to handle, despite being poisonous, and a nettle. The plant remains safely inert so long as it is dry. If the leaves are wet, the nettle becomes dangerous to handle, its poisons seeping out. This adaptation protects the plants from herbivores as one mouthful of the plant is enough to blister the inside of a cow's mouth and cause it gastro-intestinal distress.
In Game Use
The Dew Nettle can be a local menace that local folk know to avoid, and when they can deal with it. Travelers are less likely to know about this plant. Seeing the locals pushing through a field of nettles would give them no warning of the plants danger. They could then be exposed to the plant's poison during a rainstorm, passing through a field wet with mornging dew and the like. The plant could also be used as a deterrent, a spray of water turning a nettle hedge into a stinging barrier.