956 EXPERIMENT STATION RECORD. 



The detailed account of germination and growtli and general conclu- 

 sions from the more important results are given. The influence of light 

 upon spore-bearing fungi grown upon solid media is shown in tlie case 

 of the Mucors all developing their sporangia under the different condi- 

 tions. There was some difference in the growtli of tlie mycelium, it 

 being twice as long in darkness, red and yellow light as in other cases. 

 In the liquid media, the action varied with nearly every species. Bhiz- 

 02)us nUjrimnH was retarded 2 days in maturing its sporangia. Mucor 

 raceniosus developed its spores in light but not in darkness and only 

 rarely in red and yellow light. Mucor favidus behaved differently in 

 each culture solution. Thamnldium elegans and Mucor mucedo developed 

 in every case but their si)oraugia were most abundant in darkness, red, 

 and yellow light. 



The influence of light u])on conidia-bearing fungi was investigated 

 and it was found that in alternating day and night all produced their 

 conidia in about the same time without being influenced by light or 

 medium. Continuous illumination produced effects which varied with 

 the different species. Botrytis cincrca, Stcrifimatocystis nigra, and 

 ;S'. I II fed produced their conidia most abundantly under the red and yel- 

 low light. Darkness and too great a degree of illumination were alike 

 unfavorable for their best growth. For other S])ecies the illumination 

 did not seem in any way to influence their development. 



In general the development of fungi is dependent upon nutrition, the 

 action of light being of secondary importance. 



Experiments on leguminous root tubercles, W. W. Dodson 

 {L<iuisia)i(i tStas. Bui. 46, 2d ser., pp. 88-99). — A series of experiments 

 were made to ascertain the influence on leguminous root tubercles of 

 deep and shallow planting, the depth to which the nitrifying organisms 

 penetrate, and the results of transferring organisms from one host to 

 another. 



Cowpeas were plauted at depths of 1, 2, 3, 4, 5, and (5 in. The best 

 root formation and the greatest number of tubercles were obtained with 

 seeds planted 2 and 3 in. deep. 



After taking precautions to avoid infection from other sources, a num- 

 ber of pots were filled with soil taken from 1, 2, and 3 ft. below the sur- 

 face and Lima beans, Kew Era cowpeas, peanuts, and white lupines 

 grown in it. Only on the plants grown iu soil taken at the depth of 1 

 ft. were tubercles formed, but they were not so numerous as from sur- 

 face inoculation. 



The experiment in transferring the organisms from one host to another 

 indicated that each j)lant, or at most each genus of ])lants, supports a 

 specific organism capable of developing root tubercles. 



First report on the flora of Wyoming, A. Nelsox ( Wyoming Sia. Rpt. 1S96, 

 Appen.,pp. 47-21S,figs. 3, map 1).—A repriut of Bulletin 28 of the station (E. S. R., 

 8, 1.. 291). 



New species of Kan.sas fungi, .1. B. Ellis and E. Bartholomew (Kriitlen, T 

 (1897), Xo. 4, pp. 47-51). — Descriptions are given of 18 new species. 



