— 247 - 
sunshine. On one day 32 flowers were open simulta¬ 
neously. 
The following is a record of experiments with this 
species : — (Seep. 249). 
A. FASTIGIATA X A. CORYMBOSA. 
The total number of seeds resulting from hybridisation 
with A. corymbosa was 2324, and the total number which 
germinated was 2^11, that is, over 95 per cent. The 
results above indicated are verv remarkable, and difficult 
to explain. In general terms it may be stated that A. 
fastigiata was sterile under the action of its own pollen, 
but fertile under that of another species, A. corymbosa. In 
the one case a minimum of crumpled seeds was produced ; 
in the other great abundance of perfect seeds. The two 
greatest numbers borne in one capsule were 112 and 110. 
They both resulted from fertilisation by pollen from inner 
anthers. The maximum number also in the capsule of 
A. corymbosa cross-fertilised with its own pollen was 112. 
Seven capsules contained over 100 seeds in each. Too few 
experiments have been conducted with A. corymbosa 
itself to justify one making a decided statement with 
regard to its sterility when pollen is taken from one 
flower to another on the same plant. Whatever may be the 
case in A. corymbosa , one is not prepared to find so pro¬ 
nounced a sterility in A. fastigiata which is presumably 
a less specialised species. Unfortunately no opportunity was 
afforded of testing in the latter whether pollen taken from 
one plant to another would always be potent. In all proba¬ 
bility it would, otherwise the species would present the 
anomalous condition of being more easily fertilised by pollen 
of another species than by its own. 
