So named according to Pliny from its pungency. (Narium tormento)
nasus, = the nose; the nose as a seat of quick smell;
nares, narium, = the nostrils, the nose;
torto, tortare, = to torture, torment. (Ox, ld)
raphe, = a turnip, rape;
rapum, = a knob or lump formed by the roots of a tree;
-astrum, = indicates inferiority or incomplete resemblance, hence often applied to wild equivalent of a cultivated plant.
(referring to the leaves) (ld, BL, Le)