io8 BOTANICAL GAZETTE [august 



(Herb. Bishop Mus.; form very close to Gaudiciiaud's original plate); C. N. 

 Forbes, Kaala Mountains, Makaha Valley, Oahu, February 12-17, io°9 

 (Herb. Bishop Mus.; Herb. Field Mus., no. 485330; a form somewhat atypic 

 as to foliage); Hillcbrand and Lydgatc, Kula, Maui (Herb. Bishop Mus.). 



Bidens macrocarpa (Gray) SherfT. — Coreopsis (Campylotheca) 

 macrocarpa Gray, Proc. Amer. Acad. 5:126. 1862. 



Bidens macrocarpa, descript. amplificat. — Fruticosa, erecta, 

 glabra (i-i.6m. alta fide Hillebr. Fl. Haw. 214. 1888). Folia 

 subcrassa, ternata aut pinnata aut summa saepc maximam partem 

 simplicia, petiolo adjecto 0.5-2.2 dm. tonga; foliolis (3-5) ovatis 

 aut ovato-lanceolatis, cuspidatis, acriter et saepe creberrime serratis 

 (dentibus interdum valde innexis), lateralibus 2-6 cm. longis et 

 1-2 cm. latis, terminali maiore et saepius acuminata, petiolulis 

 lateralium plerumque 2-15 mm. longis; petiolis tenuibus, 2-10 cm. 

 longis. Inflorescentia laxa, aperta, foliolis linearibus vestita, 

 folia superans; capitulis non numerosis, non minutis, ligulatis, 

 ad anthesin 7-8 mm. altis et circ. 3 cm. latis. Involucri bracteae 

 subaequales, exteriores (5-7) crassae, late lineares, glabrae, circ. 

 6 mm. longae. Ligulae (5-7) flavae, trifida, 1-1 .6 cm. longae; disci 

 floribus 15-20. Achaenia pro capitulo magna, late linearia, striata, 

 glaberrima aut marginibus et apice setulosa, erecta aut subtorta, 

 1 . 2-2 cm. longa, exalata aut anguste alata, alis in duo dentes aut 

 aristas sub achaeni corporis apicem productis; aristis remotissime 

 et minutissime, antrorsum et retrorsum barbatis, raro glabratis. 



Specimens examined. — Capt. Wilkes, U.S. S. Pacif. Expl. Exped., 1838- 

 1842, Oahu (Herb. U.S. Nat. Mus., type; Herb. N.Y. Bot. Gard.; Herb. 

 Gray); Hillebrand and Lydgate, Konahuanui, Oahu, Hawaiian Islands, 

 October 1872 (Herb. Bishop Mus.) ; A. A. Heller 2901, on and near the summit 

 of Konahuanui, Oahu, November 2, 1895 (Herb. Mo. Bot. Gard.; Herb. 

 N.Y. Bot. Gard.; Herb. U.S. Nat. Mus.); C. N. Forbes 2221 O, Wahiawa- 

 Kahana trail, Oahu, August 17-20, 1915 (Herb. Bishop Mus.); idem, Palolo 

 Valley ridges, Oahu, December 17, 1908 (Herb. Bishop Mus.); idem 2313 O, 

 ridge and foot, Kalihi Valley, Oahu, March 9, 1916 (Herb. Bishop Mus.); 

 idem, Lanihuli Trail, Oahu, October 14, 1908 (Herb. Bishop Mus.); idem 

 Koolauloa Mountains between Punaluu and Kaipapau, Oahu, May 3-8, 1909 

 (Herb. Bishop Mus.); idem 2553 O, Manoa Ridge, Oahu, March 17, 1919 

 (Herb. Bishop Mus.). 



A distinguishing character of this species is the appearance of the large 

 fruiting heads. The achenes become elongate, wide, thickish, and usually 

 very glabrous. In no other species is the tendency to have awns placed 

 below the achene's top (that is, upon the margins and more or less decurrent 

 with the achene edge or wing) more pronounced than here. 



