BY J. J. FLETCHER AND C. T. MUSSON. 217 



seedling, with a stem-height of 37 inches, the two longest tumour- 

 shoots about 13 inches. It is a good example of a small tumour 

 resulting from a shortage of axillary nodules. OnU' three de- 

 veloped, of which the only one of the second pair (hidden at the 

 back of the photo) made little progress, and contributed practi- 

 cally nothing to the tumour. Small though it is, the tumour has 

 captured three good, lateral roots Two others, which were 

 accidentally broken off, and whose bases are hidden by the 

 lateral root on the right, were about to be captured. The seed- 

 ling-stem had a good canopy of foliage, and had got well ahead 

 of the tumour-shoots, so that it would probab y have got rid of 

 the latter sooner than seedlings with larger tumours. 



The seedling in fig. 1, PI. xiv., (reduced by about one-half) has 

 a concrescence of probably two pairs, with three incomplete pairs 

 above (one of which is bidden). The downward growth of the 

 concrescence on one side^ is much in advance of that of the other, 

 as shown on the left. The uppermost is a good example of a 

 belated nodule which failed to get possession of the bud; both 

 it, and the branch above it, belong to the same axil. Several of 

 the shoots have done well. Two lateral roots have been incor- 

 porated; and several others would ha\e been later on. 



Fig.3 of PI. xiv., is an example of a lopsided tumour due to the 

 absence of one nodule of the tirst pair. Unfortunately the photo 

 is slightly blurred. It has not incorporated an}^ roots. Shoots 

 are numerous. The seedling-stem may possibly be missing. 



Fig. 1. of PI. XV., is a very complete concrescence (reduced by 

 somewhat over one-third). Two lateral roots are just incorpo- 

 rated. 



Fig. 2 of the same Plate (only slightly reduced) has the con- 

 crescence incomplete behind except at the top. One good root 

 has been incorporated on the right. The root on the left with 

 a bifurcation, and the one above it, would have been incorporated 

 if the concrescence had been complete behind. 



Fig.3 of PI. XV., is a good example of a late stage. 



Fig.l of PI. xvi , shows a fine seedling, with a stem height of 

 5 feet above the tumour. The latter is shown (nat size) in PI. 

 xvii, The strongly developed taproot is now well established, 



