DISEASES OP PLANTS. 647 



which is observed to attack at least 25 species of plants, Including ornamental 

 plants and small fruits. 



In addition, the presence of Nectria cinnabarina is reported on currant canes 

 as well as on a number of other woody plants. The gooseberry mildew (Sphcero- 

 thcca mors-uvw) was observed on English gooseberries, and the gooseberry 

 rust {Mcidium grossulariw) was found on gooseberries and currants. The 

 apple scab (Ventura pomi) was common on a number of the more susceptible 

 varieties of apples grown in the nursery, and was also found to attacli tlie 

 wild crab apple. 



Club root of cabbage and other cruciferous plants is reported as common. In 

 addition, a leaf spot of salmonberry due to Septoria rubi, a rust of thimble- 

 berry due to Phragmidium rubi, and a pea disease probably caused by Ascochyta 

 pisi are also reported as being observed. 



Overwintering of parasitic fungi by means of mycelium, O. Treboux 

 (Mycol. CentbL, 5 (.1914), No. S, pp. 120-126).— The author reports in detail his 

 observations on Puccinia dispersa, P. glumarum, P. obscura, P. arenarice, P. 

 poarum, P. agropyrina, P. coronata, P. carduorum, Vredo airw, U. festucw, 

 Thecopsora pirolce, Erysiplie graminis, and Melampsora lini on various hosts 

 named in regard to their ability to survive the winter in the dry climate of the 

 steppes, which is thought to be favorable to such overwintering. 



A new North American Endophyllum, J. C. Asthue and F. D. Frommk 

 (Bui. Torrey Bot. Club, 42 (1915), No. 2, pp. 55-61, pi. 1, figs. 2).— This is a 

 detailed account of investigations noted elsewliere (E. S. R., 32, p. 749.) 



Rhizostilbella rubra, a by-fruit form of Ascobolus parasiticus, and its 

 connection with the Sclerotium disease of certain tropical cultivated plants, 

 P. C. VAN DER WoLK (Mycol. Ceutbl., 4 (1914), No. 5, pp. 236-241, pi. i).— The 

 author has studied a fungus found growing on rotting fruits and stalks of 

 Yoandzeia subterranea and has found that it exists in three forms or stages, 

 which are designated as A. parasiticus n. sp., 8. omnivorum n. sp., and R. rubra 

 n. g. and sp. 



Abnormal distribution of fruiting bodies in Ustilago tritici, E. Riehm 

 (Ber. Deut. Bot. Gesell., 32 (1914), No. 8, pp. 570-573, pi. 1).—The author has 

 been able to confirm the statement made by Henniugs (E. S. R., 6, p. 147) to 

 the effect that U. tritici may be found developing its spore masses on the axis 

 of the ear, also inside and outside the blades and sheaths of the upper leaves 

 of wheat as well as in the flowers of this plant. 



Cross sections showed the presence of the mycelium in the mesophyll, but not 

 in the vascular bundles. Spore formation occurred between the latter, which 

 accounts for the longitudinal streaking observed. The mycelium was inter- 

 cellular in a majority of cases. 



Mildew of the peach and rose, N. Woronichin (Trudy Biuro Prild. Bot. 

 (Bui. Angew. Bot.), 7 (1914), ^o. 7, pp. 441-450).— It is stated that inoculation 

 of the peach with conida of Sphwrotheca pannosa from the rose gave negativie 

 results and that a careful study of the perithecia, asci, and spores showed dif- 

 ferences in their dimensions as found on these different hosts. It is thought 

 that the biological and morphological differences noted are sufficient to separate 

 the species into the varieties S. pannosa rosw and S. pannosa persicw. 



Deformation of oat leaves, Zade (Filhling's Landw. Ztg., 63 (1914), No. 18, 

 pp. 593-595, fig. 1). — A deformation of the youngest leaf of oats with some 

 dwarfing is discussed as related to growth while enrolled in the bud. 



Stagonospora cassavse n. sp., P. C. van deb Wolk (Mycol. CentbL, 5 (1914), 

 No. 5, pp. 225-230, figs. 10). — A severe disease of cassava (Manihot utilissima) 

 appeared very suddenly at Buitenzorg early in 1913 and threatened to become 



