E. S. Salmon and H. Wormald 253 



The Glands of the Stamens. The glands of the stamens are situated 

 in the furrow on the dorsal surface of the anthers. They usually form 

 a single row along the furrow but when numerous some are out of line 

 with the rest. The number usually varies from 1 to 6. A few extreme 

 types that have been met with are suggestive that some plants have a 

 tendency to produce more, others less, glands than the average. At the 

 two extremes are HHll and BB 35 of which the figures recorded as 

 showing their fluctuation during three successive years are as follows, 

 the first figure in each case being the lowest number observed, the 

 second the highest : 



Reference number . 



of plant 1918 1919 1920 



Plant with "many" anther glands HHll 8—13 6—11 4—10 



"few" „ BB35 or 1 (rarely 2) 0—2 0—2 



Others in which the difference is less pronounced, observations having 

 been made for 3, 4, or 5 years, are : 



Plants with a tendency to 

 produce many anther glands 



Plants with a tendency to 

 produce few anther glands 



Glands on the receptacle. During an examination (see (2)) of male 

 hop plants grown from seeds collected from cultivated varieties of hops 

 it was noticed that in most cases glands were present on the inner 

 surface of the receptacle round the insertion of the stamens. In the 

 seedlings from the wild hop however glands are usually absent from the 

 receptacle which is frequently more or less tumid forming a " disc " ; 

 thus in nearly every case the receptacle glands were recorded as or 

 0(1), rarely 0(1 — 2), indicating that occasionally one gland, rarely two, 

 could be found and it was not always certain that in these cases the 

 glands had not fallen into the receptacle from the anthers. The only 

 plant which has shown any consistent deviation from the usual type 

 with respect to the receptacle glands is HH 35 of which the records for 

 the three years during which it has been examined are — 4, 4 — 10 

 usually (but occasionally — 3), 2 — 9\ 



1 a plant which has shown extraordinary fluctuation from year to year in the number 

 of glands present on the receptacle is OA47. In 1916 and 1917 the flowers of this plant 

 had comparatively a large number of glands on the receptacle. During these two years 

 Journ. of Gen. xi ^' 



