1923] 



INDEX 



427 



subruncinatus, 94; sylvicolus, 95, 

 1 1 0; Tabacon, 82 ; teretif olius, 96 ; theae- 

 folius, 97; tolimensis, 97; vaccinioides, 

 97, var. pruinosus, 97; vernicosus var. 

 major, 76, var. microphyllus , 97; Wed- 

 dellianus, 97; Xanthopappus, 98 



Senecios, studies of South American — I, 

 73 



senex (Forties), 182 



Soja max, 129 



Solanum tuberosum, 1 



Sorastrum spinulosum, 415 



Soybean fungus, 170-178 



Soybean, pod and stem blight of, 111; 

 cultural characters, 142; manner of 

 infection, 139; overwintering and dis- 

 semination, 140; varietal susceptibility, 

 141 



Sphaeropsis malorum, change in fungous 

 mat, 340; nitrogen metabolism 

 fungi, 322 

 Spirogyra lutetiana, 412 

 Spirulina major, 402; subtillissima 

 tenerrima, 402 



in 



402; 



spreta (Hymenochaete), 186 

 Staurastrum gracile, 410, forma, 

 422; paradoxum var. evolutum, 



422; i. biradiata, 411, 422; tetrace 

 f. evolutum, 411 



Stereum elegans, 187; latum, 187 

 Stigeoclonium sp., 418, 422 

 Stylospores of soybean fungus, 121 

 Sugars, reducing, determination of, 



236, 325 

 sulphureus (Polyporus), 182 

 Sweet-potato, experiments on regen 



tion with, 371, 378, 382 



410, 

 411, 



48, 



T 



tenuis (Auricularia), 189 

 tenuissima (Hymenochaete), 186 



Tetraedron limneticum, 413; quadri- 

 cuspidatum, 413, 428; trigonum var. 

 gracile, 413 ( 

 Tetrapedia Reinschiana, 401 

 Tobacco, mosaic disease of, 191 

 Trametes corrugata, 185; lactinea, 185; 



sp., 185 

 triscopoda (Naucoria), 181 



u 



Ultrafiltration experiments in mosaic 



disease, 199 

 Ustulina vulgaris, 189 



V 



villosa (Cyphella), 186 

 Virus theorv of mosaic disease, 195 

 Volvox globator, 412; mononae, 412 

 vulgaris (Ustulina), 189 



w 



Wollea saccata, 403 

 Wrightii (Lycoperdon), 189 

 Wrightii (Odontia), 186 



X 



xylophila (Lepiota), 180 



Y 



Young, R. T. Notes on the physio- 

 graphy of North Dakota and the con- 

 ditions in certain of its waters, 385 



z 



Zygnema, 411 



