A Distinctive New Species of Ouratea (Ochnaceae) from the Jalapão Region, Tocantins, Brazil

Angiosperms of dry grasslands and savannahs of Jalapão, the largest conserved Cerrado area in Brazil

“…The Jalapão region is the most undisturbed area within the Cerrado, mostly due to its nutrientpoor sandy soils and being one of the less populated parts of Brazil (Schmidt et al 2007;Yamamoto et al 2008). The region is also the largest continuous protected Cerrado area (Silva & Bates 2002), comprising 10 protected areas of which stands out the: Parque Estadual do Jalapão with 158,885 ha, Estação Ecológica Serra Geral do Tocantins with 707,078.75 ha, and Parque Nacional Nascentes do Parnaíba with 724,324.61 ha (Schmidt et al 2007; Portaria do Ministério do Meio Ambiente n o 434/2016).…”

A new cauliflorous white-flowered species of Ouratea (Ochnaceae) from the Brazilian Atlantic Forest

“…In the last 30 years, with the intensification of collections throughout the country, 34 species of Ochnaceae have been described from different vegetation types (Sastre 1981, 1994, 1997, 2005, Yamamoto 1995, Zappi & Lucas 2002, Harley et al 2005, Fraga & Saavedra 2006, Salvador et al 2006, Fraga & Feres 2007, Yamamoto et al 2008, Cardoso & Conceição 2008, Feres 2010, Cardoso 2011, Chacon et al 2011. In the Atlantic Forest, there are 62 species (with 36 endemics) within the following six genera (Fraga & Oliveira-Filho 2009): Elvasia Candolle (1811: 422), (4/4); Lacunaria Ducke (1925: 139), (1/1); Luxemburgia Saint-Hilaire (1822: 352), (8/4); Ouratea Aublet (1775: 397), (38/23); Quiina Aublet (1775 suppl.…”

“…300 species (Fiaschi et al 2010) distributed in Mesoamerica and South America. In Brazil it occurs in the Amazonian and Atlantic Forests and in the Cerrado, and comprises shrubs and trees that grow in lowland or highland forests or savannas, and sometimes in maritime thickets (Yamamoto et al 2008). The genus has remarkable leaves with the secondary veins strongly curving upwards near the usually serrate margin and continuing almost as submarginal veins, the petals are frequently yellow, the gynoecium is pseudo-apocarpic, with a gynobasic style and a usually reddish carpophore derived from the enlargement of the basal portion of the carpels, and this carpophore carries 1-10 seeds and usually erect blackish mericarps, each with a single seed (Maguire & Steyermark 1989, Yamamoto 1989, Yamamoto et al 2008, Fiaschi et al 2010.…”

“…Since then, several new species, new synonyms, and new geographical records have been published. Among these there are 15 recently described species of Ouratea: four from the Atlantic Forest (Sastre 1981(Sastre , 2001); five from the Cerrado (Sastre 1981, Yamamoto 1995, Salvador et al 2006, Yamamoto et al 2008, Chacon et al 2011; and six from Amazonian Forests (Sastre 1994(Sastre , 1995 each one is hapaxanthic, because of terminal flowering, and produces a subsequent module from a meristem in the axil of one of the distal leaves. Meanwhile, Ouratea cauliflora and O. verticillata never have terminal inflorescence: the inflorescences emerge from the stem (cauliflorous) or from short and patent branches on the stem or subterminal at the distal leaf axils, in all cases derived from a lateral bud.…”

Ouratea lancifolia R. G. Chacon & K. Yamam. (Ochnaceae), uma nova espécie do Cerrado, Brasil

“…Hoje, 121 espécies válidas são registradas no país (Chacon & Yamamoto 2010). Durante estudos realizados nos últimos 10 anos com a família, principalmente no Brasil Central (Chacon et al 2003, Yamamoto et al 2008, foram registradas populações de uma nova espécie em áreas de Cerrado em Goiás, Mato Grosso, Mato Grosso do Sul e Minas Gerais. Esta nova espécie é descrita, ilustrada e comentada no presente trabalho.…”