I 



92 



BOTANICAL GAZETTE 



[august 



namely, the curved or twisted achenes. He 



sometimes 



(B. mutica) he definitely described the achenes as "straight." 

 Since Nuttall's time, we may add, many other closely affiliated 

 species have been discovered, including forms of Bidens micrantha 

 itself, which have straight achenes, thus bringing the curved-achene 

 character into discredit. In 1856 Schultz Bipontinus undertook 

 the determination of various specimens collected on Nukahiva by 

 Edward Jardin. Finding four new species native to this single 

 small island, Schultz Bipontinus appears to have entered upon a 

 very careful and painstaking research into the subject of their 

 generic affinities, finally publishing his results 1 (Flora 39:357. 



1856). 



maintenance of a genus Campylotheca 



from Bidens, he was unreservedly against such a course. His 

 four new species from Nukahiva and all of the Hawaiian species 

 he referred to Bidens. 



my own attempts 



TINUS 



? 



his 



the Nukahiva species. 



A I 



Chamber of Agriculture of Tahiti 



careful, persistent search by his 



M 



: Nukahiva, 2 1 have been able to secure man) 

 herbarium specimens from the same islanc 



Jardin 



Achenes of 



kind 



planted, and thus, during a period of three years, several hundred 



obtained 



Havin 



& 



mented in this way my examination of the few herbarium specimens 



match 



ery 



polycephala 



cies {Bidens cordifolia, 

 are clearly distinct in 



leaf characters of the older plants and in fruit characters. More- 



1 For a personal estimate, apparently unbiased and accurate, of the taxonomic 

 ability and sagacity that Schultz Bipontinus displayed at times, see Bentham, 

 Jour. Linn. Soc. 13:340. 1873. 



3 1 cannot too gratefully thank M. St. Ahnxe and M. Henry for their great kind- 

 ness shown to me during the progress of my work. Repeatedly they have assisted 

 in procuring for me the very materials that were essential for a correct understanding 

 of the far away Pacific Island flora. 



* 





