edelweiss(n = noun.plant) leontopodium alpinum - alpine perennial plant native to Europe having leaves covered with whitish down and small flower heads held in stars of glistening whitish bracts;
edelweiss, n. [G., fr. edel noble + weiss white.].
A little, perennial, white, woolly plant (Leontopodium alpinum), growing at high elevations in the Alps. It is the national flower of Austria. [1913 Webster]