51. 3691-3693.... seriata Lindb. Fontinalis 5647........... seriata Mitt. Philonotis 956............ sericeonitens (C. Muell.) Par.Brachythecium 377............ sericeum Husn. Anomobryum 957-959........ sericeum Warnst. Brachythecium 4070-4091..... _sericeum (L.) B.S.G._ _Homalotheicum_ authentic 4092-4093...... sericeum var meridionale Homalotheicum Schimp. 4094............ sericeum var parvulum Vel. Homalotheicum 4095-4096..... sericeum var robustum Schimp. Homalotheicum 4097-4098...... sericeum var tenue Schlieph. Homalotheicum 1409-1410..... serotinum Lindb. Bryum 187-218........ serpens (L.) B.S.G. Amblystegium 220............ serpens var arachnoideum Roth Amblystegium 219............ serpens var depauperatum Amblystegium (Boul.) Braithw. 221............ serpens var serrulatum Breidl.Amblystegium 222............ serpens var tenuissimum Amblystegium 4012........... serra C. Muell. Hedwigidium 2261........... serrata Broth. Dicranella 7824-7828..... serrata (Hedw.) B.S.G. Tayloria 3250-3255..... serratum (Schreb.) Hampe Ephemelum 5071-5074..... serratum Brid. Mnium 5683........... serratum (Hook. et Wils.) Physcomitrium C. Muell. 4007............ serricola C. Muell. Hedwigia 5288........... serrulata (Funck) De Not. Oreoweisia 5684........... serrulatum Mitt. Physcomitrium 5843........... _serrulatum Broth._ _Plagiothecium sp nov_ 6692-6694..... _serrulatum (Hedw.) Jaeg._ Rhynchostegium 3588-3589..... serrulatus Brid. Fissidens 8276............ serrulatus Brid. Trachypus 2741-2751..... sessile (Schmid.) Lindb. Diphyscium 2752........... sessile var acutifolia (Bruch Diphyscium et Schimp.) Delogne 3928-3929..... sessitana De Not. Grimmia 2262........... setifera (Mitt.) Jaeg. Dicranella 1741............ setifolius Wils. Campylopus 6551............ setosum Sull. Rhizogonium 6157-6160..... sexangulare Flórke Polytrichum 5460........... shawii Wils. Orthotrichum 1020............ sieberi (Hornsch.) Mitt. Breutelia 4965........... sieberi (C. Muell.) Jaeg. Mniodendron 1551............ _sikkimense Broth._ _Calypothecium sp nov_ 4796............ sikkimense Card. Leucobryum 4917........... _sikkimense C. Muell._ _Microthamnium_ sp nov 6821........... _sikkimensis C. Muell._ _Scopelophila sp nov_ 5845-5856..... silesiacum B.S.G. Plagiothecium 5857-5873..... silvaticum B.S.G. Plagiothecium 3052-3053..... simplicissimus Warnst. Drepanocladus 599............ sinuosa Wils. Barbula 4695a-4704a... smithii (Dicks.) Mohr Leptodon 1650-1660..... sommerfeldtii (Myr.) J. Lange Campylium 5461............ sommerfeldtii Schimp. Orthotrichum