]> [author note: Herbarium and types: ICEL; additional specimens at M (lichens), C] [collector note: Herbarium (Iceland): ICEL; Iceland (col. 1885-1917): C, M (e.g. Lich., col. 1895)] Botany Stefansson, Stefan [Johann] Stefansson, Stefan [Johann] S. Stefansson Stefánsson Stefan (Johann) Stefansson 1863 1921