390 SCIENCE PROGRESS 



Primula sinensis were unrelated to any augmentation of the 

 chromosome number. R. Hume has studied the chromosome 

 number in (Enothera scintillans, and finds that in three succes- 

 sive generations the chromosome number varied from the 

 typical fifteen to as many as twenty-one. The variation is 

 attributed to fragmentation of one or more chromosomes, 

 chiefly on the grounds that whatever the number the sum of 

 their lengths remains constant. 



The inheritance of doublenegs in the flowers of Chelidonium 

 majus forms the subject of a communication by Karl Sax 

 (Genetics, pp. 207-307). The character is found to be a simple 

 recessive. There is a high degree of negative correlation 

 between petal number and stamen number, indicating that the 

 double condition is the outcome of petalody of the stamens. 

 The number of the latter ranged from 6-31, most examples 

 showing 16 , 14, 24, or 12, whilst the number of the petals 

 varied between 3 and 27, the most frequent conditions being 

 4 and 12. 



Taxonomy. — A new British fresh- water alga is described 

 by W. J. Hodgetts (New Phytologist, July). It is an epiphytic 

 member of the Ulotrichacese and bears the name Uronema 

 elongatum. 



New species of Fungi belonging to the genera Mycosphcerella, 

 Phyllostica, and Cytospora are described by W. B. Grove (Jour. 

 Bot.). Dr. Ellis, under the title " Phycomycetous Fungi 

 from the English Lower Coal Measures," describes Palceomyces 

 bacilloides n. sp. and Palceomyces gracilis, the latter being 

 referred to the fossil genus Peronosporites (Proc. Roy. Soc. 

 Edin. vol. xxxviii. p. 130). A number of additional species of 

 Compositae and other families are contributed by S. F. Blake 

 (Contrib. Gray. Herb.) and Francis (ibid.) describes new species 

 of Tricyrtis, Atriplex, Lotus, Lomatium, and Cirsium. Fernald 

 (Rhodora) describes a new species of Litorella and critical forms 

 of Epilobium. 



In the Journal of Botany for August, Spencer Moore de- 

 scribes new species of Compositae and O. Paulson an addition 

 to the genus Cereus. 



In a paper dealing with the genus Caltha in the Southern 

 Hemisphere, A. W. Hill describes three new species (Ann. Bot.). 

 American willows related to Salix artica, with three new 

 varieties, are the subject of a paper by A. C. Schneider (Bot. 



