Source : Webster's Revised Unabridged Dictionary (1913)

Linum \Li"num\ (l[imac]"n[u^]m), n. [L., flax.] (Bot.)
   A genus of herbaceous plants including the flax ({Linum
   usitatissimum}).

Source : WordNet®

Linum
     n : a herbaceous plant genus of the family Linaceae with small
         sessile leaves [syn: {genus Linum}]