The Lichen Flora of Santa Barbara Island, California

This paper constitutes the second investigation of the lichens of Santa Barbara Island. The collections made on the island by Blanche Trask in 1901-1902 were previously reported by Hasse (1903a-d, 1913). The known lichen flora is increased from 22 to 64 species. A checklist of the lichen species collected on Santa Barbara Island is included.