]> [author note: Herbarium and types: C; additional material at DBN, L, MANCH; Exsiccataesammlung af Characeer navnlig fra Danmark at B, C, FH, LD, UPS] [collector note: Herbarium: C; Denmark: B, C, DBN, FH, L, LD, MANCH, UPS. Exsiccatsamlung af navnlig fra Danmark, utgivne af P, Nielsen, nos. 1-63 (edited after 1868): FH, UPS] Botany Nielsen, Peter Nielsen, Peter P. Nielsen Nielsen Peter Neilsen 1829 1897