Proceratium silaceum rugulosum

This taxon is not in use as it is currently considered to be a junior synonym of Proceratium silaceum.

Nomenclature

 * rugulosum. Proceratium silaceum subsp. rugulosum Wheeler, W.M. 1915b: 390 (w.q.) U.S.A. Junior synonym of silaceum: Creighton, 1950a: 40.