

1920] 



SHERFF— BIDENS 



99 



been collected in localities never before visited by botanists. 

 Many of the plants collected even from the better known localities 

 were much superior in point of maturity and state of preservation 

 to those previously collected by other botanists. No less than 

 eleven species were found to be new. Still other species, while not 

 new to science, were represented in such excellent or numerous 

 forms that more elaborate descriptions and more accurate concepts, 

 were possible than when the species were first described. The 

 descriptions, with lists of specimens examined, are presented here- 

 with. 



Bidens cervicata, sp. nov. — Glabra, supra herbacea, infra 

 forsan suffruticosa, caule acute tetragono, ramoso, =±=8 dm. alto. 

 Folia membranacea, pinnata aut summis tripartita, petiolis adjectis 

 7-15 cm. longis, foliolis lanceolatis, acuminatis, serratis dentibus 

 acribus et tenuiter mucronatis, sparsim ciliatis, 2.5-9 cm. longis 

 et 0.8-2 .8 cm. latis, petiolis tenuibus 1 .5-4 cm. longis. Capitula 

 multa, subcorymbosa, ligulata, ad anthesin 5-7 mm. alta et 1.5- 



1 .8 cm. lata. 



erumque 



mm 



multo 



breviores. Ligulae circ. 5, llavidae, ovato-lanceolatae vel 

 elliptico-oblongae, apice saepe profunde et acriter dentatae, 

 7-9 mm. longae. Achaenia tenuiter linearia, nigra, exalata, 

 exaristata, glabra aut i-paucis setis munita, torta, infra angustata, 

 supra cervici-elongata, 1-1 .3 cm. longa. 



Specimens examined. — C. N. Forbes 1085 K, Waimea Drainage Basin, 

 west side, Kauai, July 3 to August 18, 1917 (Herb. Bishop Mus., type; Herb. 

 Field Mus., no 485172). 



Bidens amplectens, sp. nov. — Herbacea supra, infra verisimiliter 

 suffruticosa, ramosa, caule ramisque tetragonis, glabra, probabiliter 

 5-8 dm. alta. Folia plerumque pinnata, membranacea, petiolis 

 adjectis 4-12.5 cm. longis et 3-7.5 cm. latis; foliolis 3-5, ovato- 

 lanceolatis, serratis dentibus orbicularis, ad apicem acuminatis. 

 terminali saepe maiore, petiolis tenuibus 2-4 cm. longis. Capitula 

 non multa, sub-solitaria in pedunculis, laxissime corymbosa, 

 adolescentia iis Cosmi specierum non dissimilia, florescentia 

 6-8 mm. alta et 3-3.5 cm. lata. Involucri bracteae exteriores 

 5-6, valde reflexae, crassiusculae, lineari-oblanceolatae, ad apicem 



