552 EXPERIMENT STATION RECORD. [Vol.87 



The Uredinales found upon the Onagracese, G. R. Bisby {Amer. Jour. Bot., 

 3 (1916), No. 10, pp. 527-561) .—This is a study of the characters and correla- 

 tions of Uredinales on Onagi-acese. 



It is conceded that a perfectly consistent treatment of all the evening prim- 

 rose rusts is impossible at this time, this study attempting rather to draw atten- 

 tion to some of the more insistent questions which arise. These rusts appear 

 to fall into three somewhat definite groups, those with teliospores adherent in 

 layers, those with teliospores free and short-ellipsoid, and those with teliospores 

 free and long-ellipsoid, with a fourth group, the members of which may really 

 belong to the second and third. 



The main points brought out are the grouping of the long-cycled, autcecious 

 forms of Puccinia upon the Onagi-acese into one species and the considerations 

 involved; some notes upon hetercecious forms, which include the Onagraceae in 

 their life cycle; some correlations between species and races; and keys based 

 respectively upon the life history, upon the spore forms independently, and 

 upon the host (indicating also the geographic distribution). The hosts and 

 rusts, an index to which is also given, present many parallelisms in their evo- 

 lution. 



Endophy Hum-like rusts of Porto Rico, E. W. Olive and H. H. Whetzel 

 (Amcr. Jour. Bot., 4 (1917), No. 1, pp. U-52, pis. S).—A list given by the 

 authors, with discussion of some rusts colle<teil in Porto Rico early in 1916. 

 includes, as new genera, Botryorhiza, represented by B. hippocratece, and 

 Endophylloldes, represented by E. portoricensis ; also as new combinations, 

 Endophyllum circumscriptum, E. tcedeli€B, E. decoloratum, and E. stachy- 

 tarpheice. 



The barberry bush and black stem rust of small grains, I. E. Melhxjs and 

 L. W. DuRRELL (loica Sta. Circ. S5 (1917), pp. 4, figs. 6).— Attention is called 

 to the relation of the common European barberry (Berberis vulgaris) to the 

 black stem rust of cereals, for wliich this barberry acts as alternate host. The 

 author recommends the eradication of all of the common European barberries. 

 If such plants are desired, the .Tapauese species (B. thunhergii) may be sub- 

 stituted, as this is considered immune to rust attack. 



Sclerotinia libertiana on snap beans, J. A. McClintock (Phytopathology, 6 

 (1916), No. 6, pp. 436-Ul' figs- 2).— A detailed account is given of a serious 

 disease of a fall crop of snap beans which was Investigated at the Virginia 

 Truck Experiment Station, a popular account of the disease having already 

 been noted (E. S. R.. 36. p. 647). 



The investigations have shown that the trouble is due to S. libertiana, and 

 some evidence is said to have been obtained indicating varietal resistance 

 toward the organism. In culture the fungus isolated from beans produced 

 sclerotia, which differed in size and shape from those produced by the lettuce 

 drop organism, thus suggesting that the former organism is a special strain of 

 S. libertiana. 



The Peronospora disease of maize. A. A. L. Rutgers (Dept. Landb., Nijv. 

 en Handel [Dutch East Indies], Mcdcd. Lab. Plantenziekten, No. 22 (1916), pp. 

 SO, pis. 7). — This is a study of the lijer disease, said to be the most .serious 

 affecting Indian corn in .Java, where it has been present for at least 25 years, 

 occurring all over that island and Madura, and also in Achin, but never at an 

 altitude of more than 4,000 feet. 



The symptoms are described as differing according to the age of the plant. 

 The disease is caused by P. maydis, which is provided with conidia, chlaray- 

 dospores, and oospores, both the latter being found in decaying portions of 

 young plants, especially in the leaf sheaths. Young plants are known to be 

 susceptible to infection by conidia, but this is not known to occur normally in 



