532 
INDEX TO VOLUME VIII 
Roots, grain, note on the histology of, 207 
Rosaceae, 330; food plants of, 329 
Rosales, floral anatomy of, 403 
Rubiaceae, 330 
Rudbeckia, 193 
Rutaceae, 219; food plants of, 329 
Rye, pollen of, 480 
Sahal mexicana, 194 
Sabbatia, 193 
Sagittaria, embryogeny of, 505 
Salt proportions and concentration, effect 
of, on the growth of Aspergillus niger, 147 
Salvia, pollen tubes of, 476 
Sap flow, mechanism of root pressure and 
its relation to, 369 
Sapodilla, inoculated with Pestalozzia sp., 
523 
Saprolegnia monilifera, 232; torulosa, 235 
Saprolegniaceae, Isoachlya, a new genus of, 
231 
Sarracenia purpurea, pollen tubes of, 476 
Saxifraga sarmentosa, 291 
Scenedesmus sp., 2, 14, 15 
Schizolohiiim giganteum, 220 
Schroeteriaster, 447 
Screw-bean, 199 
Seedlings, trimerous and dimerous, 354 
Senecio Doria, 31 
Septoria, 320; apii, on celery, 523 
Seradella, 27 
Serratula arvensis, 283 
Setaria glauca, 41 ; lutescens, 41 
Siberian crab-apple, pollen of, 483 
Siblings, correlation between bundle number 
in, 357 
Sida angustifolia, 195; ciliaris, 195; cunei- 
folia, 195; diffusa, 195; filiformis, 195; 
hastata, 195; longipes, 200; neomexicana, 
200; rhombifolia, 194; spinosa, 194; tragi- 
aefolia, 200 
Siderocarpus flexicaulis, 194 
Silene, pollen of, 472 
SiNNOTT, Edmund W. (See J. Arthur 
Harris, 63, 339, 375, 425) 
Smuts, 318 
Solanaceae, 331; food plants, 329; useful 
plants of, 330 
Sorghum, 44; smut, 316 
Spartina, 194 
Spathelia simplex, 219 
Spathyema foetida, fertilization of, 476 
Specialization and fundamentals in botany, 
275 
Sphaeralcea cuspidata, 198; hastulata, 198; 
incana, 200; lohata, 196; pedatifida, 198; 
pumila, 204; suhhastata, 199; tenuipes, 200 
Sporobolus, 194 
Steffensia, 212 
Stelar theory, the eusporangiate ferns and 
the, 303 
Sterigmatocystis alho-lutea, 122; hutyracea, 
122; casianea, 120; pseudoflava, 125 
Stevens, F. L. The relation of plant 
pathology to human welfare, 315 
Stichococcus sp., 2, 14, 15 
Stomata, variations in the osmotic concen- 
tration of the guard cells during the 
opening and closing of, 30 
Strombocarpa pubescens, 199 
Stropholieion Calif ornicum, 144 
Systematic botany, the type concept in, 251 
Taraxacum, 283; densleonis, 283 
Taxaceae, pollen tubes of, 474 
Taxodium distichum, 194; mucronatum, 229 
Taylor, William Randolph. The em- 
bryogeny of Cyrtanthus parviflorus Baker, 
502 
Temperature, influence of, on the relations 
between nutrient salt proportions and the 
early growth of wheat, 59 
Thom, Charles, and Margaret B. 
Church. Aspergillus flavus, A. oryzae, 
and associated species, 103 
Tiliaceae, 331 
Tilletia horrida, 319 
Timothy pollen, 473 
Tomatoes, losses from disease, 315 
Toxicity of Rhus diver siloba, 127 
Toxicodendron triphyllum glabrum, 127 
Trelease, William. North American Pi- • 
pers of the section Ottonia, 212 
Trisetum, 255 
Triticum vulgare, 207 
Tropaeolum, pollen of, 472 
Tsuga, Aspergillus cultures on bark of, 113 
Tulipa, pollen of, 472 
Type concept in systematic botany, the, 251 
Typha elephantina, pollen of, 473 
Ulmaceae, floral anatomy of, 387 
Ulmus, 194; americana, 388; campestris, 388; 
fulva, 388; racemosa, 388; scabra, 388 
Umbelliferae, 330; food plants of, 329 
Umbrella palm, 219 
Uniola, 255 
Uredo Nyssae, 442 
