206 TUMOURS OF EUCALYPTS AND ANGOPHORAS, 



than those of other species at about the same stage; but seedlings 

 of the same species may similarly differ. Occasionally one maj' 

 find a seedling of a species lia})le to have them, and old enough 

 to show them, without any at all. One nodule of a pair is often 

 missing. Apparently, therefore, sometimes the conditions which 

 lead up to the production of nodules fail, or inoculation was pre- 

 vented, or did not take place. Sometimes, after the first pair, 

 the change from a pair of opposite, to two alternate leaves may 

 result in the appearance of two incomplete pairs. 



Plate vii. shows a set of miscellaneous, hardy bush-seedlings 

 from poor virgin soil, which are remarkable for the numbers of 

 pairs of axillary stem-nodules present: for the slow progress of 

 the lower pairs in most of them, considering how many pairs are 

 present, and consequently for delayed fusions and concrescences; 

 and for variation in the lengthening of the internodes. The first 

 five (left-right) are somewhat older than might be expected from 

 their small size. The first three are E. eugetiwides, the third of 

 which shows fusions and concrescence of nodules, while the other 

 two have done very little even in the fusion of nodules of the 

 same pair. Some of them have shoots. One nodule on the lower 

 side is missing from the third pair of the first seedling. The 

 fourth and sixth are JE. j'iperita, and show well, what is very 

 characteristic of seedlings of this species, numerous pairs, most 

 of which are crowded up through the non-lengthening of 

 other internodes besides the first and second. A later stage is 

 shown in Plate xii., tig.2; but, in this case, matters were com- 

 plicated by the death of the seedling-stem at an early stage, and 

 its replacement by two tumour-shoots, as is usual; these aie 

 remarkable for having pairs of axillary nodules (some stage of 

 three pairs in each case) the lower ones fairly close together. 

 Seedlings of this species sometimes have very shapely, large 

 tumours. 



The fifth and seventh are seedlings of E. hcemastoma. One 

 nodule is missing from each of the fifth and sixth pairs of the 

 smaller specimen. The larger one shows considerable lengthening 

 of the third and fourth internodes; also a root-nodule (r.n.) from 

 which on one side, near the base, a root (r.) emerges, which does 



