393 ACCOUNT OF A NEW GENUS OF PLANTS, 



ledonous, even in plants which, from their other characters, 

 are referable to dicotyledonous, or at least to monocotyle- 

 donous families. 



227] In these points the structure of Baffiesia remains to be 

 ascertained. In the mean time, however, if it be con- 

 sidered as a parasite, and as likely to agree with the other 

 plants of the tribe in the state of its embryo, it may be 

 remarked, with reference to the question of its affinities, 

 that such a structure would approximate it rather to Asarivm 

 than to Passiflorece. 



My principal and concluding observation relates to the 

 modes of union between the stock and the parasite. These 

 vary in the different genera and species of the tribe, which 

 may be divided into such as are entirely dependent on the 

 stock during the whole of their existence, and such as in 

 their more advanced state produce roots of their own. 



Among those that are in all stages absolutely parasitic, 

 to which division Babesia would probably belong, very 

 great differences also exist in the mode of connection. In 

 some of those that I have examined, especially two species 

 of Balanopliora} the nature of this connection is such, as 

 can only be explained on the supposition that the germina- 

 ting seed of the parasite excites a specific action in the stock 

 the result of which is the formation of a structure, either 

 wholly or in part, derived from the root, and adapted to 

 the support and protection of the undeveloped parasite ; 

 analogous therefore to the production of galls by the punc- 

 ture of insects. 



On this supposition, the connection between the flower 

 of Baffiesia and the root from which it springs, though 

 considerably different from any that I have yet met with, 

 may also be explained. But until either precisely the same 

 kind of union shall have been observed in plants known to 

 228] be parasitic, or, which would be still more satisfactory, 

 until the leaves and fructification belonging to the root to 

 which Baffiesia is attached shall have been found, its being 



' Balanophora futigosa of Forster, and B. dioica, an unpublished species, 

 lately sent by Dr. Wallich from Nepaul, wliere it was discovered by Dr. 

 Hamilton, and also found in Java by Dr. Horsfield. 



