4 AKT. 10. — S. KUSANO : STUDIES OX THE PARASITISM 



investigation. Solms also .studied the structure of the haustoiia of 

 Osyris alba, but lie did not examine, it seems to me, a sufficient 

 number of them. Scott, who was the first discoverer of the 

 parasitic nature of Santalum album, made a thorough investigation 

 of the external morphology of its haustorium, while on the other 

 hand, our knowledge on the internal structure is still far from 

 being complete.^ 



II. PARASITISM OF BUCKLEY A. 



Buckleya Quadriala is a dioeceous shrub widely distributed 

 in the central part of Japan. It has lanceolate or oval, opposite 

 leaves and very inconspicuous greenish flowers on the tip of the 

 shoot. Old stems and branches are furnished with a grayish soft 

 corky laver, which may be stripped off' in irregular thin sheets. 

 It is well known to common people on account of its wide 

 occurence and especially of its edible fruit, which is crowned with 

 four narrow leafy bracts, thus closely resembling our shuttle- 

 cock. The seeds are oval and enclose fatty substance around the 

 small cylindrical embryo. As the plant is generally periodically 

 eut down, so a very old stem was inaccessible to me, but at the 

 age of nearly 40 years it measures about 3 meters in height and 

 9 centimeters in diameter. Formerly it was thought that this 

 shrub could not be successfully transplanted ; and the fact was 

 well known to gardeners that, though its seeds easily give rise 

 to seedlings, yet these soon eease to grow and sooner or later 

 perish. The reason of this fact seems, however, to have remained 

 unknown. Recently the interesting fact of the parasitic nature 



1). Solms studied the structure of the haustorium of Santalum album on a specimen sent 

 to him by Scott. See the foot note of Scott's paper (loc. cit. p. 148). 



