As classified in WFO snapshot
June 2023
Warning: older classification
subspecies
Grimmia californica subsp. watsonii
(Lesq. & James) Kindb.
This subspecies name was first published in Eur. N. Amer. Bryin. 2: 226 1897
This subspecies name has been reclassified since this snapshot. Its current preferred usage is a synonym .