Kadua is a genus of flowering plants in the family Rubiaceae. It comprises 29 species,Kadua At: World Checklist of Rubiaceae At: Kew Gardens Website. (see External links below). all restricted to Polynesia. Twenty-two of these are endemic to the Hawaiian Islands. Some of the species are common at high elevation. Others are single-island endemics or very rare, and a few are probably extinct. Kadua affinis is widely distributed in Hawaii and is polymorphic.David J. Mabberley. 2008. Mabberley's Plant-Book third edition (2008). Cambridge University Press: UK. p. 448 The type species for the genus is Kadua acuminata.Kadua In: Index Nominum Genericorum. In: Regnum Vegetabile (see External links below).

Kadua was formerly included in a broadly defined and polyphyletic Hedyotis, which encompassed, in addition to Kadua, species now placed in Oldenlandia, Oldenlandiopsis, Houstonia, and other genera. Hedyotis is now circumscribed more narrowly.

Species In the following list, Kadua haupuensis is added to the species listed by Edward E. Terrell et alii.

Kadua acuminata Cham. & Schltdl. Kadua affinis (A.Gray) W.L.Wagner & Lorence Kadua axillaris (Wawra) W.L.Wagner & Lorence Kadua centranthoides Hook. & Arn. Kadua cookiana Cham. & Schltdl. Kadua cordata Cham. & Schltdl. Kadua coriacea (Sm.) W.L.Wagner & Lorence Kadua degeneri (Fosberg) W.L.Wagner & Lorence Kadua elatior (H.Mann) W.L.Wagner & Lorence Kadua fluviatilis C.N.Forbes Kadua flynnii (W.L.Wagner & Lorence) W.L.Wagner & Lorence Kadua foggiana (Fosberg) W.L.Wagner & Lorence Kadua foliosa Hillebr. Kadua formosa Hillebr. Kadua fosbergii W.L.Wagner & D.R.Herbst Kadua grantii (Fosberg) W.L.Wagner & Lorence Kadua haupuensis Lorence & W.L.Wagner Kadua knudsenii Hillebr. Kadua laxiflora H.Mann Kadua littoralis Hillebr. Kadua lucei (Lorence & J.Florence) W.L.Wagner & Lorence Kadua nukuhivensis (J.Florence & Lorence) W.L.Wagner & Lorence Kadua parvula A.Gray Kadua raiateensis J.W.Moore Kadua rapensis F.Br. Kadua romanzoffiensis Cham. & Schltdl. Kadua st-johnii (B.C.Stone & Lane) W.L.Wagner & Lorence Kadua tahuatensis (Lorence & J.Florence) W.L.Wagner & Lorence Kadua tryblium D.R.Herbst & W.L.Wagner

History

The genus Kadua was erected in 1829 by Adelbert von Chamisso and Diederich von Schlechtendal.Adelbert von Chamisso and Diederich von Schlechtendal. 1829. Linnaea 4:157. (see External links below) They named it for Kadu, a native of Ulea, one of the Marshall Islands. Kadu was a friend of von Chamisso and provided valuable assistance to the 1815–1818 expedition led by Otto von Kotzebue. The generic name Kadua fell into disuse in the 20th century, because most authors considered it to be a synonym of Hedyotis. In 1999, twenty species of Kadua were described as species of Hedyotis in a Flora of Hawaii.Warren L. Wagner, Derral R. Herbst, and Sy H. Sohmer. Manual of the Flowering Plants of Hawaii, Revised Edition, 1999. Bishop Museum Press: Hololulu, HI, USA. Kadua flynnii was described in 1998,Warren L. Wagner and David H. Lorence. 1998. "A New, Dioecious Species of Hedyotis (Rubiaceae) from Kauai, Hawaiian Islands, and the Taxonomy of Kauai Hedyotis schlechtendahliana Resolved" . Novon 8(3):311–317. and Kadua haupuensis in 2010.David H. Lorence, Warren L. Wagner, and William G. Laidlaw. 2010. "Kadua haupuensis (Rubiaceae: Spermacoceae), a new endemic species from Kauai, Hawaiian Islands". Brittonia 62(2):137-144. Kadua was resurrected in 2005. This taxonomic change was corroborated by molecular phylogenetic studies of the tribe Spermacoceae in 2008 and 2009.

Phylogeny The following phylogenetic tree is partly based on a phylogenetic analysis of DNA sequences, and partly inferred from the classification followed in a 2005 paper.

References

External links

Kadua At: Search Page At: World Checklist of Rubiaceae At: Index by Team At: Projects At: Science Directory At: Scientific Research and Data At: Kew Gardens Kadua At: Index Nominum Genericorum At: References At: NMNH Department of Botany Kadua In: Linnaea, volume 4 At: Linnaea At: Titles At: Botanicus Kadua At: Plant Name Query At: IPNI Kadua (exact) At: Names At: Tropicos At: Science and Conservation At: Missouri Botanical Garden Kadua At: List of Genera At: Rubiaceae At: List of families At: Families and Genera in GRIN At: Queries At: GRIN taxonomy for plants Kadua At: Spermacoceae At: Rubioideae At: Rubiaceae In: ··· Embryophyta At: Streptophytina At: Streptophyta At: Viridiplantae At: Eudaryota At: Taxonomy At: UniProt Hedyotis At: List by Species Name At: Hawaiian Ethnobotany Online Database At: Searchable Databases At: Bishop Museum Kadua littoralis At: Choose a Plant At: Meet the Plants At: National Tropical Botanical Garden Kadua affinis At: Rubiaceae At: Plants of Hawaii At: Images At: Hawaiian Ecosystems at Risk