]> [author note: Herbarium and types: BHU (main herbarium), JE (musci), P (ferns); additional material at BR, E, GOET, FR, M. Pteridophyta Exsiccata at B (extant), BHU, M, P, PH, SI; Herbarium Plantarum Criticarum Select. Hybr. Florae Rhenanae at FH, NY, PC] [collector note: Original collections: BHU, JE, P; Germany: B?, BREM, E, F, G, GOET, L, PH.] Botany Wirtgen, Ferdinand Paul Wirtgen, Ferdinand Paul F. P. Wirtgen F. Wirtg. F. Wirtgen Ferdinand Paul Wirtgen 1848 1924