Tetracorala or Tetracoralla: How To spell?

The word Tetracorala is misspelled against Tetracoralla, a noun meaning "Same as Rugosa."

Tetracoralla has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings tetracora & a which should not be misspelled with single 'L'
Wrong Spelling:  tetracora-l-a 
Correct Spelling:  tetracora-ll-a 
Find more incorrect spellings of Tetracoralla to spell right way.