Mulein or Mullein: How To spell?
The word Mulein is misspelled against Mullein, a noun meaning "Any plant of the genus Verbascum. They are tall herbs having coarse leaves, and large flowers in dense spikes. The common species, with densely woolly leaves, is Verbascum Thapsus."
Mullein has double "ll" is mispronounced as "l"Remember double 'LL' in between the strings mu & ein which should not be misspelled with single 'L'
Wrong Spelling:  mu-l-ein  Correct Spelling:  mu-ll-ein 
Check more misspelled words of Mullein to spell it correct.