426 



[Vol. 10 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



the physiography of, and the condi- 

 tions in certain of its waters, 383 







Odontia Wrightii, 186 

 Oedogonium 6p., 417 



Oocyst is crassa, 413; lacustris, 413; 

 pusilla, 413 



Oospora Citri-auranti, 244 



Oranges, acid and sugar content of, 227 



Oscillatoria amphibia, 401; brevis, 401; 



chalybea, 401 ; janthiphora, 401, 422 



ostreatus (Pleurotus), ISO 



Oxalic acid, determination of, 236 



p 



Pandorina morum, 412 

 Pediastrum boryanum, 416, var. longi- 

 corne, 416; duplex var. clathratum, 



416, var. gracillimurn, 416; simplex, 



417, var. duodenarium, 417; tetras, 

 417 



Penicillium digitatum, 241; italicum, 



240; stoloniferum, 241 

 Peptone solutions, 323 

 perideniae (Aleurodiscus), 187 

 Peronospora infestans, 2 

 Persomni (Polysticttis), 185 

 Pholiota marginata, 181 

 Phoma Betae, 322; nitrogen metabolism 



in, 334 



Phoma blight of soybean, 111 



Phomopsis Citri, 244, 289 



Physiography of North Dakota, notes on, 

 and the conditions in certain of its 

 waters, 385 



pinsitus (Polystictus), 184 



Pleurotus flabellatus, 180; ostreatus, 180 



Pod and stem blight of soybean, 111, 

 170-178; description of, 112; morphol- 

 ogy of, 115 



Polycystis pallida, 399; stagnalis, 399 

 Polyporus arcularius, 182; chioneus, 



182; dryophilus, 182; flabellaris, 182; 



gilvus, 182; lignosus, 182; sulphureus, 



182 

 Polystictus fibula, 184; floccosus, 184; 



hirsutus, 184; microloma, 184; Per- 



soonii, 185; pinsitus, 184 

 polytrichia (Exidia), 188 



Poria fasciculata, 184; sp., 185 

 Potato blackleg, with sj>ecial reference 



to the etiological agent, 1 

 Potato plants, affected with blackleg, 



showing characteristic symptoms, 70, 



72 

 Protozoan theory of mosaic disease, 197 

 Psacalium vaccinioides . 97: alabratum. 97 



Psathyra, 181; glareosa, 181 

 Pycnospores of soybean fungus, 119; 



germinating, 120 

 Pycnosporophores of soybean fungus, 



119 



R 



Rainfall, relation of amount of, to pre- 

 valence of pod and stem blight of 

 soybean, 145 



Regenerative phenomena in plants, an 

 histological study of, 369 



Rhabdoderma sigmoidea, 398, 422, f. 



minor, 398, 422 



Rhizoclonium crispum, 419; hieroglyphi- 



cum, 419 

 rhizomorphus (Crepidotus), 181 

 rimosus (Fomes), 184 

 Rivularia coadunata, 406 

 robustus (Fomes), 184 



s 



sanguinea (Daedalea), 185 

 Scenedesmus bijugatus, 413, var. alter- 

 nans, 413, var. flexuosus, 413; dimor- 

 phus, 414; obliquus, 414; quadricauda, 

 414, var. bicaudatus, 414, 422, var. 

 quadrispina, 414, var. Westii, 414 

 Schizophyllum commune, 181 

 Sclerotinia Libertiana, 244, 287 

 Selenastrum gracile, 415; Westii, 415 

 Senecio aberrana, 73, 100; abietinus, 75; 

 adenophyllus, 75; adenotrichus, 75; al- 

 ternifolius, 76; andicola, 76; apicula- 



tus,76; arboreus, 77; aridus, 77, 102; 



attenuatus var. microphyllus , 80; auri- 

 tus, 78; brachycodon, 78; Buchtienii, 

 78; Chinogeton f. macrocephalus, 80; 

 chaquiroeiisis 79; clavifolius, 80; 

 comosus, 80; culcitioides, 81; decom- 

 positus, 81; ericaefolius, 81; formosus, 

 82; formosus, 93, var. subruncinatus, 

 94; genuflexus, 82; involucratus, 83; 

 iodopappus, 83; laciniatus, 84; lati- 

 florus, 84; ledifolius, 76; lophophilus, 

 84, 104; Magnusii, 85: medullosus, 85; 

 Microchaete, 86; modest us, 86; nubi- 

 genus, 87; organensis, 87; otophorus, 

 87 -patens, 87 ; pellucidiner vis, 88 j Pen- 



nellil, 88, 106, var. gachetensis, 89; 



pericaulis, 89; pimpinellijolius var. 

 laciniata, 84, var. nubigena, 87; pindi- 

 licensis, 90; pulchellus, 90; rudbeckiae- 



folius, 90; sanctae-martae, 91 ; Bcor- 



t if olius ,91; sinapoides, 92 ; Sprucei , 93 ; 

 stigophlebius, 93; Stuebelii, 93; sub- 

 decurrens, 93 ;subglomerosus 93, 108; 



