Exanulate or Exannulate: How To spell?

The word Exanulate is misspelled against Exannulate, an adjective meaning "Having the sporangium destitute of a ring; -- said of certain genera of ferns."

Exannulate has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings exa & ulate which should not be misspelled with single 'N'
Wrong Spelling: exa-n-ulate
Correct Spelling: exa-nn-ulate
Check more misspelled words of Exannulate to spell it correct.