490 SUMMARY OF CURKENT RESEA.RCHES RELATING TO 



plants from East Africa (Uganda and Nairobi). There is one species of 

 Uromyces, U. Folygalde, on the sori of which he found pycnidia of 

 Darluca filum ; the other species belong to Puccinia. Of the six species 

 listed one only had been previously described. 



Ed. Fisher* records the results of various infection experiments. 

 He placed the teleutospores of Thecospora sparsa from Ardostaphylos 

 alpina on new young shoots of Ahies pectinata and some other conifers. 

 After a time secidia were observed on the Abies ; they are very similar 

 to those of other Thecosporae ; the spores become orange-coloured. 



The writer also inoculated successfully Pucciniastrum Girceae on the 

 same plant, the teleutospores having been collected from C%rcaea lutetiana. 

 Both are cases of new infections. 



J. C. Arthur t writes on the orange rusts of Ruhus. It had been 

 demonstrated by Kunkel that, in the United States, there existed two 

 types of such rusts on Ruhus : one a long cycle form identical with 

 Gymnoconia interstitialis, and the other a short cycle form first named by 

 Schweinitz as JEcidmm nitens. These forms are alike morphologically ; 

 there is no difference between the secidium of the one and the teleuto- 

 spore sorus of the other, except in the process of spore-germination. 

 Arthur accepts Kunkel's decision, and proposes a new generic name, 

 Kmikelia, for the new genus, diagnosed as being composed of sub- 

 cuticular pycnidia and sub-epidermal teleutospore sori. The teleutospores 

 are catenulate, globoid, or, in some cases, elongated, one-celled, the 

 epispore colourless or pale and verrucose. There are no paraphyses 

 or peridium. A list is given of host-plants, but it is necessary to 

 germinate the spores in order to determine the genus of the rust present. 

 Arthur suggests with some assurance that the rose Gseoma of Northern 

 California may prove to be a species of Kimkelia. 



A study of North American species of Puccinia ou Gar ex has been 

 made by Frank D. Kern.:f Telia and teliospores do not afford good 

 diagnostic characters, but the uredospores are more distinctive and of 

 more value in classification, and have been chiefly used in the synoptic 

 tables drawn up by the author. The secidia are to be found on a wide 

 variety of hosts ; in only one case is the host monocotyledonous. Kern 

 describes nineteen species, a few of them being new to science. 



G. G. Hedgcock and N. Rex Hunt§ publish some new species of 

 Peridermium : — P. Ipomese on Pinus echinata, etc., the secidial form of 

 Coleosporiiim Ipomese ; P. terebinihaceae, also on several species of Pinus ; 

 and P. HeUanthi, which has been collected on Pinus virginiana. Two 

 other species, P. fragile and P. minutum, have not been associated with 

 their Goleosporium stages. 



M. Savelli || has published a list of Uredinese from Tuscany, many 

 of them new to that province. He has added not only new localities but 

 new hosts for a number of species. Biological observations are given as 

 well as numerous morphological and bibliographical notes. 



* Centralbl. Bakt., xlvi. (1916) pp. 333-4. See also Bull. Agric. Intell. Rome, 

 viii. (1917) pp. 660-1. t Bot. Gaz., Ixii. (1927) pp. 501-15. 



X Mycologia, ix. (1917) pp. 205-38. 

 § Mycologia, ix. (1917) pp. 239-42. 

 II Nuovo Giorn. Bot. Ital., xxiii. (1916) pp. 235-59. 



