1917] DISEASES OF PLANTS. 845 



form of this fungus is reported for the first time on Pinus echinata. This 

 material was used in inoculating Coreopsis major cetnleii, and C. vertioiUata, 

 resulting in the formation of uredinia and telia of Coleosporium inconspiouum. 



The Peridermium belonging to Coleosporium iponioeae, G. G. Heogcock and 

 N. R. Hunt {Abs. in Phytopathology, 7 {1911), No. 1, p. 67).— The authors de- 

 scribe P. ipomccw, a new foliicolus species on Pinus echinata, P. palustris, 

 P. rigida, and P. twda. Plants of Ipomcca lacunosa, I. pandurata, I. triloba, 

 Pharbitis barbigera, P. hederacea, and Quamoclit coccinea under controlled con- 

 ditions were successfully inoculated with the seciospores of this Peridermium, 

 producing on their foliage the typical uredinia and telia of C. ipomceoB. 



Some new hosts for Coleosporium solidaginis, G. G. Hedgcock and N. R. 

 Hunt {Abs. in Phytopathology, 7 (1917), No. 1, p. 68). — Peridermium acicoliim, 

 the secial stage of C. solidaginis, is reported for the first time on species of 

 Pinus, and positive results are said to have been obtained from inoculations 

 with the fficiospores of P. acicolum on plants of species of Aster and Solidago. 



A Peridermium belonging to Coleosporium terebinthinaceae, G. G. Hedg- 

 cock and N. R. Hunt (Abs. in Phytopathology, 7 (1917), No. 1, p. 67). — The 

 authors describe a new foliicolus species, P. terebinthinaceutn, occurring on 

 Pinus echinata, P. rigida, and P. ta^da, with a range from North Carolina to 

 Georgia. Inoculations were made under controlled conditions with the 

 iBciospores of this Peridermium on plants of Silphium asteriscus, S. integri- 

 folinm, S. irifoUatum, and Parthenium integrifoliutn, and in about two weeks 

 the uredinia and later the telia of C. terebinthinacece appeared on the leaves of 

 all these species. C terebinthinacece has been reported on the leaves of S. an- 

 gustum, S. compositum, S. dcntatum, S. glabrum, and S. pinnatifidum. 



Notes on Cronartium comptonige. III, P. Spauxding (Phytopathology, 7 

 (1917). No. 1, pp. ^9-51). — In continuation of notes on this and related fungi 

 (E. S. R., 33, p. 3.51), the author presents additional data. 



The additional pine hosts, Pinus densiflora, P. jeffreyi, P. laricio, P. mugho, 

 and P. resinosa, have been reported for C. comptonio'. Uredinia have been pro- 

 duced on plants of Comptonia asplenifolia with seciospores from a number of 

 species of Pinus. Uredinia on Comptonia were successfully used to produce 

 uredinia on Comptonia and Myrica gale. Uredinia from M. gale produced 

 uredinia on Comptonia. 



Observations made by the author in a number of localities have shown that 

 Cronartium comptonice fruits on pines principally in a period of seven or eight 

 weeks, reaching its maximum about June 1, a date considerably earlier than 

 that previously reported. The author believes that P. rigida is much less sus- 

 ceptible to the disease than are P. pondcrosa and P. co-ntorta, the loss among 

 which has been total. 



Does Cronartium ribicola winter on the currant? W. A. McCubbin (Phyto- 

 pathology, 7 (1917), No. 1, pp. 17-Sl, fig. 1). — In continuation of a previous note 

 (E. S. R., 36, p. 0-52), the author offers data to substantiate his hypothesis 

 that C. ribicola hibernates as mycelium in infected buds of currant. This is 

 believed to be in agreement with known habits of other rusts under like condi- 

 tions and of similar nature and is supported by the general and irregular ap- 

 pearance of the currant stage of the fungus over large areas in which there is 

 reason to believe that there are no pine infections. Special cases where rust 

 has occurred on currants which are distant from any possible source of in- 

 fection are reported, and in one instance the only case of rust in one large black 

 currant plantation was on two of four plants which had been badly infected in 

 the preceding year. A report is also given of the occurrence of currant rust on 

 plants set out in a rust-free district in order to test overwintering. 



