title: Two new non-spinySolanum(Solanaceae) from the Gran Chaco Americano and a key for the herbaceous glandular-pubescent solanums from the region.
abstract: The Gran Chaco Americano is a major savanna woodland system in South America that harbours great plant and animal diversity. Two new herbaceous species of the Morelloid clade ofSolanum(largely corresponding to the traditional Solanum section Solanum) are described here from the Bolivian Chaco. Both species are morphologically similar to a group of related species with glandular pubescence and enlarged, foliaceous calyces that includesSolanum atriplicifoliumGillies ex Nees,Solanum nitidibaccatumBitter,Solanum physalifoliumRusby,Solanum sarrachoidesSendtn. andSolanum tweedianumHook.Solanum woodiiSärkinen & S.Knapp,sp. nov.is unusual in the Morelloid clade in having tapering anthers on short filaments, and is superficially similar to the unrelatedSolanum anomalostemonS.Knapp & M.Nee from dry forests in Peru.Solanum michaelisSärkinen & S.Knapp,sp. nov.is distinct in its enlarged calyx with a short tube and long lobes that apparently reflex at fruit maturity. Both new taxa are illustrated, their conservation status assessed, and their distributions mapped. We also provide a key to the glandular-pubescent herbaceousSolanumspecies of the Chaco vegetation to aid in identification of these taxa.
authors.affiliation: Royal Botanic Garden Edinburgh, 20A Inverleith Row, EH3 5LR Edinburgh, United Kingdom.
authors.forename: Tiina
authors.initials: T
authors.lastname: Särkinen
authors.affiliation: Department of Life Sciences, Natural History Museum, Cromwell Rd, SW7 5BD London, United Kingdom.
authors.forename: Sandra
authors.initials: S
authors.lastname: Knapp
keywords: Bolivia; Morelloid clade; Solanaceae; Solanum section Solanum; South America; chaco woodlands; endemism