Ironar

The "dwarven grass" is another name for ironar. This 20 inches tall plant with dark blue leaves and bright orange flowers grows almost exclusively on mountainous terrain full of iron and minerals, which explains the legend that says ironar only grows in the entrance to the dwarven mines. Anyway, the thick roots of this plant (up to 2 inches in diameter!) is used to protect from paralysis.
A decoction of ironar gives a +1 bonus to saving throws against being paralyzed for 1 hour.