134 



Hordeum tetrastichum pallidum. 



Ordinary six-rowed barley. 

 All kernels from outer rows of 

 the head slightly twisted; ker- 

 nels from middle row symmet- 

 rical and distinguished from 

 the two-rowed sorts by being < 

 broader nearer the tip, the base 

 half being somewhat elongated. 



Type IX (a; Kernels with long haired 

 rachillse and lodicules and 

 without teeth on the lateral 

 nerves. 



" X (/5) Kernels with long haired 

 rachilla3 and lodicules and 

 with teeth on the lateral 

 nerves. 



" XI (f) Kernels with short haired 

 more or less woolly rachillse 

 and lodicules and without 

 teeth on the lateral nerves. 



" XII (8) Kernels with short haired 

 more or less woolly rachillse 

 and lodicules and with teeth 

 on the lateral nerves. 



NOTE. The different barley types are commonly distinguished in 

 Scandinavia by Greek letters. (See in brackets above.) 



The constancy of the peculiar character of rachilla3 or basal bristle of 

 the different sorts is remarkable. The development of teeth on the lateral 

 nerves on the other hand is not quite so constant a character. Thus in 

 types II and IV, for example, the development of teeth on certain 

 kernels belonging to a given sort may not always be well pronounced. In 

 the same manner, sorts belonging to Types I and III may produce kernels 

 on the nerves of which an occasional well developed tooth is to be found. 

 Despite these occasional irregularities the presence or absence of these teeth 

 is regarded as of great importance as a distinguishing feature. 



Concerning the various botanical marks under consideration, the 

 question has been raised as to whether or not all kernels on the same plant 

 invariably possess the same peculiar character of rachillae. A German 

 writer (Broili) expresses the opinion that although variations of this sort 

 may not occur in Sweden there is no reason why they should not arise in other 

 countries. Regarding this question Tedin (73, p. 5) says: "There is nothing 

 to show that the soil and climate of Germany should be more capable of 

 producing variations of such a nature than is that of Sweden." Discussing 

 the possibility of these variations arising even at home, he says: "I have 

 worked for eight years with barley and with hundreds of pure lines but 

 have never yet found a single example of such variation.". While strictly 

 speaking, the above system must be regarded as a means of distinguishing 

 types rather than sorts, yet it will readily be seen that the genuineness of a 

 given sort may often be determined on this basis. An instance may here be 

 given: At present there are only two pure sorts belonging to Type I on the 

 Swedish market. These are Princess and Hannchen which bear the stock 

 book numbers 0105 and 0110 respectively. Should a quantity of barley be 

 offered for sale or placed on exhibition under the name of either of these 

 sorts it would be an easy matter to decide whether or not the goods really 



