Sphagnum molluseum—Stachys silvatica S19 
ar mollusecum Brid. 693 
-—— nemoreum 689 
— obesum 689 
— obtusum 694 
— pallidum Warnst. 712 
— palustre 689 
— . pseudocontortum 689 
— Pylaei Brid. 687 
— recurvum 693 
— riparium Angstr. 664, 675 
— Rothii 689 
—- ruppinense 693 
— Schimperi 689 
— serratum 693 
— squarrosum 689, 703 
— subbicolor 689 
— subsecundum 640, 646, 689 
— tenellum 689, 693 
— teres 703 
— Torreyanum 693 
— trinitense 693, 694 
— Vandenbroeckei Naveau* 710 
—- virginianum 693 
— Warnstorfii Russow 664 
— Wulfianum 685 
Sparganium simplex 296 
Sphenochloris Pascher N. &. 219 
Sphenolobus 666 
— Hellerianus 667 
— Michauxii 648, 677 
— minutus 648 
— saxlcolus 662 
Sphenomonas 181 
Sphinx cestri 457 
Spilanthes 89 
Spilogaster 425 
Spinacia glabra 325 
— spinosa 325 
— tetrandra 482 
Spiraea 544 
— filipendula 557 
— gigantea var. rosea 557 
— ulmaria 557 
Spiranthes aestivalis 319 
— spiralis 319 
Spiridens 725 
— Reinwardtii 713 
Spirillum 261 
— sputigenum 260 
— volutans 261 
Spirodinium 188 
— eoneentricum Lebour 188 
— fissum Levand. 188 
— glaucum Lebour 188 
— grave Meunier 188 
— laeryma Meunier 1883 
— spirale var. acutum Lebour 187 
Spirogyra 25, 36, 38, 39, 74, 75, 76, 
77, 78, 79, 80, 94, 261, 264, 298, 
305, 306, 543, 627. N. A. 208 
— colligata 77 
—— rare U TU 
— Hassallii 75 
— jugalis 300 
| — longata 264 
— mirabilis 78 
— reetispira Merriman* 78 
— setiformis 75 
— spreeiana Rabh. 75 
— ternata 78 
— Weberi 75, 76 
Spirotaenia 76. — N. A. 208 
Spirulina 44, 52. — N. A. 175 
— major 48 
ı — pseudovacuolata Uterm. 120 
Schroederi Koppe* 120 
— tenuissima 149, 152 
— —. var. salina Wislouch* 149 
Splachnaceae 647 
Splachnidium rugosum 105 
Splachnum 284, 491 
 — ampullaceum 660 
— sphaericum 646, 672 
ı — Wormskjoldii Hornem. 733 
Spondias pinnata 323 
Spondylomoraceae 86 
Spondylomorum quaternarıum 87 
Spondylosium 79, 81. — N. A. 208 
ı — monile 208 
ı — pulehrum var. triquetrum Lund 208 
ı — tetragonum 126 
Spondylothamnium multifidum Naeg. 
109 
Spongomonas 55, 300, 581 
Spongomorpha N. A. 219 
Spongospora subterranea 354 
Sporopodium N. A. 17 
Spyridia 114 
— filamentosa 114, 164 
Stachys silvatica 410 
