title: New and resurrected Hawaiian species of pilo (Coprosma, Rubiaceae) from the island of Maui.
abstract: Two species of Coprosma (Rubiaceae) J.R.Forst. & G.Forst. are described from the island of Maui of the Hawaiian Archipelago. A newly described taxon, Coprosma cordicarpa J.Cantley, Sporck-Koehler, & M.Chau, sp. nov. is locally common in medium to high elevation dry forests and shrublands of leeward East Maui. The second taxon is resurrected from the synonymy of Coprosma foliosa A.Gray as Coprosma stephanocarpa Hillebr. and occurs in mesic to wet rainforests of both East and West Maui. Both taxa are segregated from Coprosma foliosa, with which they share similar morphological characters. A conspicuous and persistent calyx of the fruit and various floral characters most easily differentiate both taxa from other Hawaiian taxa. The newly described Coprosma cordicarpa is further distinguished from Coprosma stephanocarpa by a central constriction of the fruit with a depressed apex, which gives it a characteristic heart shape. Furthermore, the taxa are largely separated phenologically, ecologically, and geographically. Descriptions, conservation status, and specimens examined for the new species are included.
authors.affiliation: Department of Biology, Bucknell University, 1 Dent Drive, Lewisburg, Pennsylvania 17837; Department of Botany, University of Hawai'i at Mānoa, 3190 Maile Way, Honolulu, Hawai'i 96822.
authors.forename: Jason T
authors.initials: JT
authors.lastname: Cantley
authors.affiliation: State of Hawai'i, Department of Land and Natural Resources, Division of Forestry and Wildlife, 1151 Punchbowl Street, Honolulu, Hawai'i 96813; Department of Botany, University of Hawai'i at Mānoa, 3190 Maile Way, Honolulu, Hawai'i 96822.
authors.forename: Margaret J
authors.initials: MJ
authors.lastname: Sporck-Koehler
authors.affiliation: Lyon Arboretum Hawaiian Rare Plant Program, University of Hawai'i at Mānoa, 3860 Mānoa Road, Honolulu, Hawai'i 96822; Department of Botany, University of Hawai'i at Mānoa, 3190 Maile Way, Honolulu, Hawai'i 96822.
authors.forename: Marian M
authors.initials: MM
authors.lastname: Chau
keywords: Auwahi; Coprosma; Coprosma cordicarpa; Coprosma stephanocarpa; East Maui; Haleakalā; Hawaiian Islands; Kanaio; Maui; Rubiaceae; West Maui; pilo