160 



CLASSIFICATION OF PARASITES. 



imbedded in regular grooves in tlie cortex, ought not to lie considered as parasites. 

 The Lonicera ciliosa of North America, represented in fig. 31, may be taken as an 

 example of creepers of this kind. They only interfere with the conduction of the 

 constructive materials generated in the green foliage, preventing, in particular, the 



Fig 31.— Loiiiccro «iiosa in Suutli ( ii. hii.i 



part of the axis below the strangulating coils from being supplied with those 

 materials; and so at last they cause the whole trunk, which serves as their support, 

 to dry up. The assertion may then be made that the young tree assailed has been 

 strangled or throttled bj^ the creeper, but not that the latter has drained it of juices 

 and adapted them to its own use. Still less woukl the statement be applicable to 

 the numerous brown and red sea-weeds, which settle upon the ramifications of the 

 great species of Sargassavi, or of the innumerable Diatomaceee, which often entirely 



