Cyanea ferox Hillebr. var. horrida Rock, Bull. Torrey Bot. Club 44: 235. 1917.
Type information:
Holotype [BISH]. J. F. Rock 10056. March 1912. Maui: [East Maui, western slope of Mt.] Haleakala, [slopes of the crater] Pu`ukakai.4500ft. Isotype(s) [A!, BISH! [6], CAS!, GH!].
=Cyanea horrida