6 
attacked by it in December commenced to show signs of damage 
by the lower leaves wilting and failing off The ^ots were -ostly 
destroyed and the stem at the base discoloured and decaying. U 
was removed, and the stem some six feet tall cut into cuttings which 
commenced to grow. 1 have failed to obtain the fruit of this 
fungus. 
A good many plants from foreign countries flower regularly, but 
fail to set fruit. This may be due to a variety of causes. It s 
very common to find plants which flower heavily, and Ido not Trmt 
fLf because they are passed over and not visited by any insects. 
FeftnLhgTnsects seem often to take some years before they find 
out and visit even conspicuous flowers^ I have never ^" an V) ■_ 
visit spathodea nilotica or Eucharts Amazomca not e ^ otics 
Mia nor any of these plants to produce fruit. Yet many exotics 
are immediately visited by insects which can never have se ^ n 
before, and speedily fertilized, even although they are appa ■ J 
more or less adapted for fertilization by other insects 
maroniense, is a shrub or small tree commonly cultivated but which 
has never so far as I know been seen to fruit in the Botanic Gardens. 
, I have seen, however, a big shrub of it at Perhentian Tinggi in eg^ 
Sembilan originally from the stock of the plant in 
Gardens ’in Singapore loaded with fruit. I believe the plant is 
viSfcd by one of the Acherontias, Death’s Head moths, thelanre of 
whichX feeds on the leaves, and which is abundant in Singapore. 
].(, tubular flowers such as Ipomea arborea (/. carnea) and 
BiLnta magnified, large Humble-bees [Xylocofa) constantly vis. 
tofSers, and obtained the honey by cutting through the base of 
the tube withoht attempting to enter the mouth of the flower a . 
fertilizing it. These plants have never set fruit. 
It is oossible that many of these exotics do not produce honey in 
their ' nectaries arid so hold out no inducement to insects to visit 
their nectan ckles G f which two species are cultivated here, 
them. constantly visited by Sthingidce, which so 
(Lomcera) are, ^ ve sever al times seen Sphinx Convolvuli dart 
• 1 fSS sn* every flower' of a bunch of honey- 
into the hojse a though probably every flower in 
or more L& moths, the plant has 
never yet produced a Single .ruit. 
Tn ,nmp cases certainly l .flower fails to produce pollen, the 
seeking insects which remove it before it can be applied to toe 
stole and is evidently intended for fcr tdization by a ha » k ;™‘ h a 
• The flowers lire °f xhejr are^uickiy^ti'sito^by the small bee Trigona, 
nocturnal flower. They a q J collects all the pollen from 
pl “‘ 
