Verrucaria nigrescens
Verrucaria nigrescens Pers.
Verrucaria nigrescens Pers.
Leona Heights, Oakland Hills, back of Melrose, Oakland
A. W. C. T. Herre
The Field Museum of Natural History
A. W. C. T. Herre
GEODETIC_DATUM_ASSUMED_WGS84 INSTITUTION_MATCH_FUZZY AMBIGUOUS_COLLECTION