58 Eumj^cetes. 



Juel, O., Ein Beitrag zur Kenntniss des Urornyces Poae Rabh. 

 (Svensk Botanisk Tidskrift. II. p. 169-174. 1908. With 2 figs. in 

 the text.) 



The author first reviews recent experiments, which have been 

 made for the concise knowledge of the group of Urotnyces, which were 

 formerly included in Uroniyces Dactylidis Otth. This species is to be 

 divided into 4 different partly morphologically well separated species: 

 Urornyces Dactylitis Otth., U. Festucae Sydow , U. Ranunculi Festucae 

 Jaap and U. Poae Rabh. The latter is by the author divided into 

 9 different biological forms: 1. f. ficariae nemoralis, 2. f. fic. triviatis, 

 3. f. fic. pratensis, 4. f. repentis nernoralis, 5. f. rep. trivialis, 6. f. 

 aiiricorni pratensis, 7. f. cassubici pratensis, 8. f. repentis pratensis, 

 and 9. f. bullati bnlbosae. The f. 2 may as well be transferred from 

 Ficaria to Poa palustris as to P. trivialis, f. 4 as well from P. nerno- 

 ralis to Ranunculus biilbosus as to R. repens f. 5 as well from R. reperis 

 to Poa annua as to P. trivialis; all the other forms are only to be 

 found on the species, after which they are called. They 6 first combi- 

 nations have formerly been proved by experiments, which have 

 partly been confirmed by the author by his own experiments. Re- 

 specting f. 7 the author states that he has made experiments of culti- 

 vation both in the house and in the open air with Aecidiospores from 

 Ranunculus cassubicus, which produced Uredo on Poa pratensis, expe- 

 riments in the reverse way he did not attempt. 



Further the author has made experiments of cultivation confir- 

 ming those of Tranzschel respecting the connection between 

 Aeciclium Ficariae and Uroinyces Rumicis, and he points out by the 

 text and b}^ excellent pictures as well the micro- as macroscopic 

 dififerences found between the 2 sorts of Aecidia on Ficaria. 



I. Lind (Copenhagen). 



Kölpin Ravn, F., Kaalbroksvampen, Plasniodiophora Brassicae 

 Woronin. (Tidsskrift for Landbrugets Planteavl. XV. p. 525 — 620. 

 Copenhagen 1908.) 



This is the most detailed account which has tili now been pu- 

 blished on this disease, and it gives so much information that it 

 will be difificult to comprise it into a small abstract. The author dis- 

 cusses all that has been written on this subject from "The Mö- 

 rdern Husbandman" by W. Ellis 1742 tili now, and he further 

 States the results of all the experiments, which have been made in 

 Den mark during the last years under his surveyance. He first 

 discusses all the different ways, in which the fungus sticks to the 

 place where once found, and in which they propagate to new fields. 

 Scraps of diseased turnips spread infection; the}'' are spread together 

 with the manure or are brought from one field to another sticking 

 to the wheels of the carts. Manure of cattle, which have fed on the 

 diseased turnips is not infective, when not mingled with the scrap, 

 not devoured. The author enumerates 42 species of Cruciferae, 

 found with "Finger and Toe", most of them are common weeds, 

 which may be supposed to be infected b}" the cultivated turnips; 

 but "Funger and Toe" has also been found on some species of 

 Nasturtium and Cardamine in moist pastures far from cultivated 

 fields, and the author is not uninclined to take it for granted. that 

 the disease in the fields originate from these. The author states 

 several examples, where the disease seems to have been propagated 

 by the seed f. inst, when a man has sown seed from 2 different 



