126 PROCEEDINGS OF THE AMERICAN ACADEMY 



that species and some Bidens, with retrorsely hispid awns. The Sand- 

 wich Islands offer a series of species which equally connect the Psilo- 

 carpcea section of Bidens with Coreopsis. Some of these, having their 

 achenia remarkahly curved or twisted at maturity, were naturally dis- 

 tinguished as a separate genus, Campylotheca. But its adoption merely 

 gives us three limitless genera unmarked by any peculiarity of habit in 

 the place of two artificially separated ones. The foregoing species is in 

 all respects a good Coreopsis. The first of the following ones differs 

 merely in its elongated achenium, slightly disposed to curve or twist. 

 The others are Campylothecce, with more or less curved or spirally 

 twisted achenia, either narrowly wing-margined or wingless, but mani- 

 fest congeners of the rest. Their union with Coreopsis is suggested 

 both by their wanting the technical character of Bide7is, and by the fact 

 that the former already contains species with winged and with curved 

 achenia. On the other hand only a slight and arbitrary line is to be 

 drawn between Bidens Sandwicensis, Less., and Campylotheca micran- 

 tha. Yet when the (always straight) achenia of the former bears awns, 

 these ai'e retrorsely hispid, although sparingly so. Vain is the attempt 

 to draw absolute limits where Nature luxuriates in gradations ; but, on 

 the whole, the old distinction between Bidens and Coreopsis appears to 

 be practically the best one. 



Coreopsis (Campylotheca) macrocarpa (sp. nov.) : herbacea ? 

 glabra ; foliis pinnatira 5-sectis, segmentis ovatis cuspidato-acuminatis 

 argutissime creberrime serrulatis ; pedunculis oligocephaHs folia sub- 

 superantibus ; acheniis pro capitulo magnis (subpollicaribus) linearibus 

 striatis alatis vix tortis subapice biaristulatis seu bicorniculatis. — Sand- 

 wich Islands, on the mountains of Oahu. 



Coreopsis (Campylotheca) Macr^i {Campylotheca grandijlora, 

 DC. Prodr.) : herbacea, puberulo-hirtella ; ramis elongatis patentibus ; 

 foliis ternatim sectis, segmentis lanceolatis acuminatis creberrime ser- 

 ratis ; capitulis laxe paniculatis baud magnis ; acheniis linearibus gla- 

 berrimis calloso-mai'ginatis calvis "aut junioribus vix bisetosis" spirali- 

 ter tortis. — Hawaii, Sandwich Islands, Macrae, Remy. The above 

 character is drawn up (with De Candolle's in view) from no. 287 of 

 Remy's collection, supplied by the Paris Museum. The species does 

 not merit the name grandijlora (preoccupied in Coreopsis), although 

 the heads are nearly twice the size of those of C. micrantha. 



Coreopsis (Campylotheca) cosmoides (sp. nov.) herbacea, fere 

 glabra ; foliis caulinis pinnatim 5-sectis summisve trisectis, ramealibus 



