84 Morphologie, etc. — Varietäten, etc. 



druck (Verunstaltungen der Krone fehlen), nicht Frost (da in der 

 Nähe normale Exemplare der Fichte vorkommen), sondern Beein- 

 flussung durch den Untergrund. Das Seefelder Moor beherbergt 

 auch schöne Bestände von Pinus uncinata Rom. und Betula nana L. 



Matouschek (Wien). 



Bateson, W., Note on experiments with flax at thejohn 

 Innes Horticultural Institution. (Journ. of Genetics. V. p. 

 199—201. 1916.) 



This paper is by way of being a note in connection with Eyre 

 & Smith 's paper on the cross pollination of flax in the same num- 

 ber of the Journal of Genetics. 



Many commercial samples of L. nsitatissimum were obtained 

 from different localities and it was found that the plants of each 

 sample were irregulär in height, being obviously a mixture of 

 several types. As the result of experience in selection, it is consi- 

 dered that the raising of a tall strain of flax is a very easy matter 

 and can be done by simple selection of materials already existing 

 in common crops. How many genetically distinct heights exist 

 cannot be said. Besides the oil fiaxes, which are about l 3 / 4 feet 

 high, there are certainty three heights 1) a tall strain about 4 feet 

 high, 2) Several ordinary blue (also white) strains about 3 feet high, 

 3) A dark blue, true breeding type, about 2 1 / 2 f" eet high- Each of 

 these is, almost beyond question, genetically pure. All attempts to 

 cross L. nsitatissimum with L. perenne failed: while the experiments 

 have shown, on the other band, that flax is perfectly seif fertile. 



W. Neilson Jones. 



Bateson, W. and C. Pellew. On the genetics of „Rogues" 

 among culinary peas {Pisum sativum). (Journ. of Genetics. V. 

 p. 13—36. 1915.) 

 Work was commenced in 1912 with the varieties 'Ne Plus 



Ultra' (N.P.U.), 'Early Giant' (E.G.) and 'Duke of Albany' (D.A.). 



The former variety was not grown after 1912 owing to its suffering 



badly from bacterial disease. The experience of the authors with 



these three varieties is that: 



1) Typical plants occasionally throw rogues and, in the case of 

 E.G., certain intermediate forms. 



2) Rogues of whatever origin have offspring exclusively rogues. 

 No exception to this rule has occurred. 



3) The intermediates of E.G. give mixed families of various 

 compositions. 



4) Crosses between types and rogues, however made, have (with 

 rare exceptions in EG) always given rogues though these in their 

 juvenile condition are generally type-like: these rogues have given 

 always only rogues. The rogues are at least as tall as the types but 

 their leaves stipules and petals are comparatively small and narrow 

 although the plants are perfectly healthy and well grown. The 

 pods of the rogues in E.G. and D.A. with great constancy curve up- 

 wards along the dorsal suture, while the pods of the types of these 

 varieties are straight. In the rogues of N.P.U. the pods are straight 

 but blunt while those of the type are pointed. These are many 

 other differences more or less well marked. 



After growing very many thousand plants of these varieties, 

 the authors conclude that the rogues do not appear as regulär 



