236 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



species of fungi occurring on dung originate from spores swallowed by the 

 animal along with its food." Nearly eighty species are enumerated, and 

 a large proportion are also described. This number includes two new 

 genera and various new species. Several have occurred on the dung of 

 exotic animals obtained through the kindness of Mr. C. Bartlett, of the 

 Zoological Gardens, Regent's Park. Under Anixiopsis stercoraria, Hans., 

 it is said that Hansen succeeded in germinating its spores in various 

 media (beerwort, cooked rice, decoction of rabbit-dung) after the spores 

 had been kept for twenty-one years. Two beautiful plates are given, 

 which show that these fungi are exceedingly attractive in the various 

 forms they assume. There are 131 figures, and it is needless to say that 

 the paper is valuable and important on the subject upon which it treats. 



R. I. L. 



Cork Tissues in Roots. 

 Cork Tissues in Roots of some Rosaceous Genera. By Martha 



Bunting, Ph.D. (Contr. Bot. Lab. Phil. vol. ii., No. 1, p. 54 ; pi. 10).— 

 Large intercellular spaces are present in the cork region of the herbaceous 

 genera, smaller spaces in the shrubby genera, but absent in the arbores- 

 cent genera studied. 



A marked characteristic of the herbaceous and shrubby genera is the 

 annular arrangement of the cells of the periderm region. In the arbores- 

 cent specimens the annular arrangement is not a feature. Results 

 obtained from the study of this annular arrangement suggest that each 

 ring corresponds to a year's growth. 



In herbaceous and shrubby species a notable feature is the presence of 

 a uniseriate layer of cells in which a lamella of suberin is present in the 

 cell walls ; this may or may not be present in the multiseriate layers. 



Nuclei have been noted alike in the uniseriate layers on which the 

 cell walls and contents are pigmented and in the multiseriate layers. 

 Observed in some regions in cells of the eighth layer. 



Starch is present in cork cells of all the rosaceous genera, smaller 

 quantities in the uniseriate than in the multiseriate layers, and in arbores- 

 cent than in herbaceous. 



Pigment found in all the rosaceous genera investigated. 



Results of these investigations upon the periderm indicate a possible 

 evolutionary relation of the groups of Bosacece. — M. C. C. 



Ckonartium. 



Cronartium. On an epidemic of Cronartium rib kola (Dietr.) in the 

 Dahlemer Botanic (iardens. By P. Hennings (Not. Kb nig. Bot. Berlin, 

 vol. iii. (4902), No. 28, p. 172). — The curious uredine Cronartium has 

 attained considerable notoriety of late years owing to its having been 

 shown to be a heteroecious form — uredo- and teleuto-spores — of one of 

 the several tucidia known as Peridermium on Pines. 



Hennings points out that although Peridermium Strobi is not known 

 to him in the neighbourhood of Berlin, its alternate form Cronartium 

 ribicola is common in epidemic form on various species of Bibes, and 

 especially on B. nigrum, B. aurcum, and B. rubrum. 



