taxonID	type	description	language	source
CCF5E93C010255E5892BDF7D5E907F44.taxon	description	Description. Erect subshrubs to shrubs 1 - 2 m tall. Leaves simple, 2.5 - 13 cm long including petiole, blades lanceolate or elliptic-lanceolate, 1.8 - 9.5 x 0.5 - 3.8 cm, glabrous, margins serrate, apex acuminate. Heads (1 -) 3 - 4 (- 7), in diffuse cymes terminating main stem and lateral branches, 5 - 15 mm in diameter excluding rays, peduncles 1.2 - 9.5 cm long, glabrous; outer involucral bracts 4 - 13 mm long, linear, well differentiated from inner bracts, recurved, apex erose, sometimes with few short hairs; ray florets ca. 13, sterile, rays yellow, 12 - 15 x 2 - 5 mm; disk florets ca. 30 - 32, perfect, corollas yellow. Achenes black, straight, 8 - 10 x 1 - 2 mm, glabrous or with few inconspicuous setae near the apex; pappus of 2 - 3 antrorse barbed awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
CCF5E93C010255E5892BDF7D5E907F44.taxon	distribution	Distribution. Marquesas Islands, occurring on Hiva Oa and Tahuata, (400 -) 620 - 1200 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
CCF5E93C010255E5892BDF7D5E907F44.taxon	discussion	Discussion. Bidens henryi has conspicuous linear, recurved outer involucral bracts.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
A1B013D41C6CA8DEBCEB5C8ED3DC28ED.taxon	description	Description. Erect subshrubs 0.5 - 2 m tall. Leaves simple or very rarely (Nuku Hiva) compound and trifoliolate, 3 - 15.5 cm long including petiole, blades lanceolate to elliptic-lanceolate, 2 - 11 x 1.2 - 5 cm, glabrous or lower surface occasionally pubescent, especially on young leaves, margins variably serrate to serrulate or subentire, apex acuminate or occasionally acute or caudate (Nuku Hiva). Heads 10 - 80 (- 100 +), glabrous to sparsely pubescent at base, in diffuse cymes terminating main stem and lateral branches, main inflorescence axis up to 6.5 cm, heads 2 - 5 mm in diameter excluding rays, peduncles 0.1 - 5 cm long, glabrous or sparsely pubescent; outer involucral bracts 1 - 4.5 mm long, well differentiated from inner bracts, glabrous to sparsely ciliate; ray florets 3 - 12 per head, sterile, rays yellow, 3 - 12 x 1 - 4 mm, apex rounded, entire or bi- or tri-lobed; disk florets ca. 12 - 25, perfect. Achenes gray to black, straight or slightly curved, 3 - 8 x 0.5 - 1 mm, margin setose; pappus of 0 - 2 short awns. n = 36 (Gillett 1972).	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
A1B013D41C6CA8DEBCEB5C8ED3DC28ED.taxon	distribution	Distribution. Marquesas Islands, occurring on Nuku Hiva, Ua Huka, Hiva Oa, Mohotani, and Tahuata, 10 - 800 (- 1080) m. The occurrence on Mohotani is based on observation by Jean-Francois Butaud (pers. comm., 2014), but should be verified by collections.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
A1B013D41C6CA8DEBCEB5C8ED3DC28ED.taxon	discussion	Discussion. Bidens polycephala is the most variable of the Marquesan Bidens, and is also the most widespread, occurring on four islands. It is similar to Bidens henryi but differs in having much shorter involucral bracts and in the large but variable number of heads among individuals, and it occupies drier and lower elevation habitats. Some of the collections of this species from Nuku Hiva seem to grade toward Bidens bipontina as they have more caudate leaf apices and longer rays (e. g., Florence 4332, 4353, and 4390 from Toovii Plateau area) than collections from other areas of Nuku Hiva and other islands. Specimens from the Terre Deserte, Haatuatua Valley (Gagne & Montgomery 2463, 2471) have heads on the smaller end of the variation like some other collections from Nuku Hiva, but uniformly have compound leaves. Compound leaves occurs only in Haatuatua and the adjacent Tapueahu Valleys, and they are found in all three of the species that occur there (Bidens cordifolia, Bidens bipontina, and Bidens polycephala). Otherwise these species all have simple leaves. The only exception to this is the rare occurrence of compound leaves in Bidens microcephala on Fatu Hiva. This pattern could be the result of presence of compound leaves in populations of one of the three species and hybridization among them at some time in the past. Two collections are considered putative hybrids and are discussed below. Gillett (1972) used a collection (Gillett 2194) in his experimental studies of Pacific Bidens. He determined that Bidens polycephala was self-compatible and is capable of forming fully fertile F 1 hybrids with several Hawaiian species (Bidens mauiensis (A. Gray) Sherff, Bidens menziesii (A. Gray) Sherff, and Bidens molokaiensis (Hillebr.) Sherff).	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
EC56F994D5575478AFAA075070E59556.taxon	description	Description. Erect, suffrutescent perennial herbs 0.6 - 3 m tall. Leaves simple, 4.5 - 12 cm long including petiole, blades lanceolate to lanceolate-elliptic, 3 - 8.5 x 1 - 4 cm, mostly glabrous, except for a tuft of hairs on lower surface at base, margins serrulate to serrate, apex acuminate to occasionally acute. Heads 3 - 12 (- 16), in diffuse cymes, terminating main stem and lateral branches, 2 - 8 mm in diameter excluding rays, peduncles 0.4 - 7 cm long, stout; outer involucral bracts 1.5 - 8 mm long, well differentiated from inner bracts, margins ciliate, inner bracts often with a tuft of hairs at apex; ray florets 5 - 11 per head, sterile, rays yellow, 7 - 15 x 1.5 - 5 mm; disk florets ca. 23 - 25, perfect. Achenes gray or black, straight, 3 - 5 x 0.5 mm, tipped, margin setose; pappus of 2 irregularly antrorse barbed awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
EC56F994D5575478AFAA075070E59556.taxon	distribution	Distribution. Marquesas Islands, endemic to Ua Pou, 6 - 920 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
EC56F994D5575478AFAA075070E59556.taxon	discussion	Discussion. Bidens uapensis can be differentiated from other species in having achenes that have pronounced barbed awns and leaf blades with a tuft of hairs on lower surface at the base, a character not seen in any of the other Marquesas Bidens.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
B2EECB3C1C7353ACB54F537CC24C2D54.taxon	description	Description. Erect, suffrutescent perennial herbs 1 - 1.3 m tall. Leaves simple, (4 -) 6 - 14.5 (- 20) cm long including petiole, rarely compound, blade lanceolate to lanceolate-elliptic, occasionally lanceolate-linear, (1.5 -) 3.5 - 9.5 (- 14) x (0.9 -) 1.3 - 4 cm, glabrous, margins serrate to serrulate, occasionally subentire, apex acuminate. Heads 40 - 50, in compact cymes, becoming diffuse at maturity, heads often in tight clusters, terminating main stem and lateral branches, main inflorescence axis 6 - 9 cm, heads 1 - 2 mm in diameter, peduncles 0.1 - 1.5 cm long, glabrous; outer involucral bracts 1 - 2 mm long, well differentiated from inner bracts; ray florets absent; disk florets (1 -) 5 - 10, perfect. Achenes gray or black, straight, 3 - 4 x 0.5 mm, sparsely setose; pappus absent.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
B2EECB3C1C7353ACB54F537CC24C2D54.taxon	distribution	Distribution. Marquesas Islands, endemic to southern and central Fatu Hiva, 10 - 625 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
B2EECB3C1C7353ACB54F537CC24C2D54.taxon	etymology	Etymology. The specific epithet refers to the extremely small heads, probably the smallest in the genus.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
B2EECB3C1C7353ACB54F537CC24C2D54.taxon	discussion	Discussion. Bidens microcephala exhibits the most reduced heads of all Marquesan Bidens, generally having 10 or fewer disk florets per head and completely lacking in ray florets. In several specimens (Price & Wood 231, Wood & Perlman 4539, Wood & Price 10103, Perlman & Wood 14996), this reduction is even more extreme; flower heads in these specimens contain consistently fewer than 4 florets each, often only two or even occasionally one. These latter specimens also universally exhibit entire to subentire leaf margins and might represent yet another evolutionary lineage worthy of formal recognition (e. g., in Lorence 7823, specimen from cultivated plant grown from seed from Perlman 14996).	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
E298EB73E5C852509D52FB8DDEE109D4.taxon	description	Description. Erect, suffrutescent perennial herbs 0.5 - 1 m tall. Leaves simple, 5 - 7 cm long including petiole, petiole stout, blades thick and coriaceous, ovate to broadly ovate, 3 - 4.5 x 1.8 - 2.5 cm, glabrous, the veins on lower surface conspicuously raised, margins serrate, apex short-acuminate. Heads 1 - 2, in compact cymes terminating main stem and lateral branches, 4 - 5 mm in diameter excluding rays, peduncles ca. 2 cm long, stout, glabrous; outer involucral bracts ca. 3 - 4 mm long, broad, well differentiated from inner bracts; inner bracts dark purple, erose and with a few short hairs; ray florets ca. 6 - 8, sterile, rays yellow, obovate, 10 - 12 x 4 - 7 mm, apices often bi- or tri-lobed; disk florets ca. 30 - 34, perfect, corollas yellow; pappus absent. Achenes not seen.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
E298EB73E5C852509D52FB8DDEE109D4.taxon	distribution	Distribution. Marquesas Islands, Ua Pou, known only from the type on the summit crest around Oave and the nearby peak of Matahenua, ca. 920 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
E298EB73E5C852509D52FB8DDEE109D4.taxon	etymology	Etymology. This new species is named for Kenneth R. Wood, who made the only known collection of it and who has contributed greatly to our knowledge of the flora of the Marquesas and Hawaii through his collections, excellent photography, and field observations.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
E298EB73E5C852509D52FB8DDEE109D4.taxon	discussion	Discussion. Bidens woodii is most similar to Bidens evapelliana but can be differentiated by its habit (erect versus prostrate, and 0.5 - 1 m versus 0.3 - 0.5 m tall stem), leaves with raised venation, and obovate rays. It is known only from the type collection.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
31FF314038095DD284AF23E838775FBC.taxon	description	Description. Prostrate, suffrutescent perennial herbs up to 0.3 - 0.5 m tall. Leaves simple, coriaceous, 1.3 - 3.6 (- 7) cm long including petiole, petiole relatively short, blades elliptic to ovate, 1 - 2.8 (- 5.6) x 0.7 - 2 (- 3.5) cm, glabrous, margins serrate, apex rounded to acute. Heads 1 - 3, in compact cymes terminating main stem and lateral branches, 4 - 8 mm in diameter excluding rays, peduncles 1 - 2.5 cm long, glabrous; outer involucral bracts 4 - 6 mm long, broad, well differentiated from inner bracts; ray florets normally 3 - 6 per head, sterile, rays yellow, ca. 8 x 2 - 5 mm; disk florets ca. 23 - 25, perfect. Achenes tawny to gray, straight, ca. 5 x 1 mm, slightly keeled, glabrous; pappus of 2 irregular antrorse barbed awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
31FF314038095DD284AF23E838775FBC.taxon	etymology	Etymology. This species is named in honor of Eva Pell, Under Secretary for Science at the Smithsonian Institution upon her retirement. She served in this position from 2010 to 2014 during which time she worked to strengthen science across the institution. Her accomplishments include creation of the four " Grand Challenges Consortia, " which have been instrumental in developing interdisciplinary collaborations across the Smithsonian. She also played a key role in creating the Smithsonian's Tennenbaum Marine Observatories Network, the first worldwide network of coastal field sites to standardize measurements of biological change in marine environments.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
31FF314038095DD284AF23E838775FBC.taxon	discussion	Discussion. Bidens evapelliana is distinctive in its nearly exclusive prostrate habit and relatively small elliptic to ovate leaves. One specimen, Perlman 14959, is somewhat atypical to other collections of Bidens evapelliana in that it has larger leaf blades 4.3 - 5.6 x 2.0 - 3.5 cm, petioles up to 2 cm long, and slightly longer involucral bracts (ca. 6 mm).	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
924C33BBEC045D68973D2138DE770539.taxon	description	Description. Scandent to ascending suffrutescent perennial herbs 0.5 - 2 m tall. Leaves simple, 3.5 - 13.5 cm long including petiole, blades lanceolate to elliptic-lanceolate, 2.3 - 9.5 x 1.2 - 4.5 cm, glabrous, margins serrate, apex acute. Heads 1 - 3, in diffuse cymes terminating main stem and lateral branches, 8 - 15 mm in diameter excluding rays, peduncles (2 -) 3.5 - 14 cm long, glabrous; outer involucral bracts 8 - 12 mm long, broad, well differentiated from inner bracts; ray florets 14 - 20 + per head, sterile, rays yellow, 10 - 18 x 3 - 4 mm; disk florets ca. 50, perfect, corollas yellow. Achenes black, straight, 7 - 10 x 1 - 2 mm, slightly keeled, glabrous; pappus of 2 irregular antrorse barbed awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
924C33BBEC045D68973D2138DE770539.taxon	distribution	Distribution. Marquesas Islands, known only from the central summit region of Fatu Hiva (Tevaiua, Hanativa, and Tekau), 670 - 870 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
924C33BBEC045D68973D2138DE770539.taxon	etymology	Etymology. This new species is named for Charles R. " Chipper " Wichman, Jr., Chief Executive Officer and Director of the National Tropical Botanical Garden since 2005, and previously Director of NTBG's Limahuli Garden on Kaua'i since 1994.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
924C33BBEC045D68973D2138DE770539.taxon	discussion	Discussion. Bidens wichmanii has the largest heads among the Marquesan species. The glabrous achenes are also distinctive in being keeled along the long axis.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
854C8E8AFDD0501FB1014DC5C435D233.taxon	description	Description. Erect, suffrutescent perennial herbs 1 - 1.3 m tall. Leaves membranous, simple or compound and trifoliolate, 4.3 - 15 cm long including petiole, blades elliptic-lanceolate to narrowly elliptic, 3 - 10.5 x 1 - 3 cm, glabrous, margins serrate, apex long-acuminate to caudate. Heads 6 - 15, often with two or three heads in tight clusters, in cymes terminating main stem and lateral branches, 2 - 5 mm in diameter excluding rays, peduncles 2 - 25 mm long, glabrous; outer involucral bracts ca. 5 mm long, linear, well differentiated from inner bracts, glabrous; ray florets usually 7 - 9 per head, sterile, rays yellow, 13 - 20 x 3 - 4 mm, apex often minutely bi- or tri-lobed or rounded; disk florets ca. 30 - 32, perfect. Achenes black, 6 - 7 mm long, margin setose; pappus usually of 2 minute awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
854C8E8AFDD0501FB1014DC5C435D233.taxon	distribution	Distribution. Marquesas Islands, Nuku Hiva, endemic to the Toovii Plateau area, especially Tapueahu Valley, 500 - 1165 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
854C8E8AFDD0501FB1014DC5C435D233.taxon	discussion	Discussion. Bidens bipontina is distinctive in its conspicuously caudate leaves and erect linear involucral bracts.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
514A0F1EFD4C5FB2743E59B47BA09512.taxon	description	Description. Erect subshrubs 0.4 - 1 m tall; young stems and leaves moderately to densely pubescent. Leaves simple or compound and trifoliolate, 6 - 16 cm long including petiole, blade elliptic to elliptic-lanceolate, 4 - 9 x 2 - 4.8 cm, moderately pubescent, especially on lower surface, midrib, veins, and in a line along the petiole, margins serrate, apex acuminate to caudate. Heads usually 5, in cymes terminating main stem and lateral branches, 5 - 10 mm in diameter excluding rays, peduncles 1.5 - 4 cm long, sparsely pubescent, hair becoming denser near the heads; outer involucral bracts 5 - 9 mm long, oblong-elliptic, spreading, well differentiated from inner bracts, moderately to sparsely ciliate; ray florets usually 6 - 13 per head, sterile, rays yellow, ca. 15 x 4 mm; disk florets ca. 30, perfect. Achenes black, straight, ca. 3 x 0.5 mm, margins setose; pappus usually of 2 - 3 irregular antrorse barbed awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
514A0F1EFD4C5FB2743E59B47BA09512.taxon	distribution	Distribution. Marquesas Islands, occurring only in a relative small area of the Toovii Plateau on Nuku Hiva, from 750 - 1130 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
514A0F1EFD4C5FB2743E59B47BA09512.taxon	discussion	Discussion. Bidens cordifolia is one of the least known species of Bidens in the Marquesas Islands. We have seen only two collections we refer to this species as well as images taken by Jean-Francois Butaud in 2008 and 2009 of additional populations. In addition to these collections and observations this species was only known from the type and a collection made in 1840 (Barclay 3213, BM) as cited by Sherff (1937).	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
7A0B352B828D53628F1605C3B3C0C88D.taxon	description	Description. Erect subshrubs 0.7 - 1.3 m tall. Leaves simple, 1.5 - 9.5 cm long including petiole, blades narrowly ovate or lanceolate, 1 - 7 x 0.8 - 4 cm, glabrous or pubescent toward the base and in a line along the petiole, margins serrulate, apex acuminate. Heads (1 -) 3 (- 4), in diffuse cymes terminating main stem and lateral branches, 5 - 15 mm in diameter excluding rays, peduncles 1.5 - 11.8 cm long, glabrous; outer involucral bracts 4 - 9 mm long, broad and tapering somewhat at the base, apex sometimes erose, inner bracts sometimes erose at apex; ray florets 5 - 11, sterile, rays yellow, 9 - 15 x 2 - 3 mm wide, apex entire or divided into 2 - 3 acute to rounded lobes; disk florets ca. 30 - 34, perfect, corollas yellow. Achenes gray, straight or slightly curved, 8 - 10 x 1 mm, conspicuously setose; pappus of 2 antrorse barbed awns.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
7A0B352B828D53628F1605C3B3C0C88D.taxon	distribution	Distribution. Marquesas Islands, occurring on Eiao and Hatutaa, 150 - 500 m.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
7A0B352B828D53628F1605C3B3C0C88D.taxon	discussion	Discussion. Bidens beckiana is characterized by having outer and inner involucral bracts that are scarcely differentiated from the pales, and very broad outer bracts that are usually somewhat constricted at the base.	en	Wagner, Warren L., Clark, John R., Lorence, David H. (2014): Revision of endemic Marquesas Islands Bidens (Asteraceae, Coreopsideae). PhytoKeys 38: 37-67, DOI: http://dx.doi.org/10.3897/phytokeys.38.7609, URL: http://dx.doi.org/10.3897/phytokeys.38.7609
