Vascular Flora of the Tocantins River Middle Basin, Brazil

Abstract

This study provides a checklist of the phanerogams and pteridophytes of the Tocantins river middle basin, in northern Goiás state and southern Tocantins state, Brazil. Herbarium samples were collected from 2000 to 2009 and this floristic survey recorded 1572 species from 135 families. The most species-rich families were Fabaceae (217), Poaceae (116), Asteraceae (88), Euphorbiaceae (65), Orchidaceae (58) and Malpighiaceae (56). Furthermore, 14 endangered species and 31 rare species were recorded, mainly associated with the campos rupestres in the Veadeiros Plateau region. The flora mainly from the phytophyisiognomies cerrado stricto sensu, campo rupestre (“rocky fields”), mata de galeria (“gallery forest”), mata ciliar (“riverine forest”) and semi-deciduous seasonal forest comprised typical species of the mid-western Cerrado floristic province, such as the most widely known woody plants Anadenanthera colubrina (Vell.) Brenan (popular name angico), Aspidosperma subincanum Mart. ex A. DC. (guatambú), Astronium fraxinifolium Schott ex Spreng. (gonçalo-alves), Callisthene fasciculata Mart. (pau-jacaré), Dipteryx alata Vogel (barú), Guazuma ulmifolia Lam. (mutamba) and Magonia pubescens A. St.-Hil. (tingui). This study is the first to record a wide floristic list of this important region of central Brazil.

Diversidade de Asteraceae em um campo de murundus no sudoeste de Goiás, Brasil

“…e Ayapana amygdalina Três espécies foram inventariadas em três estudos: Chrysolaena obovata (Less.) Dematt., (Nakajima & Semir 2001;IBGE 2004;Medeiros et al 2012), Ichthyothere terminalis S.F.Blake (Munhoz & Proença 1998;IBGE 2004;Medeiros et al 2012) Hattori & Nakajima (2011). Apesar de terem sido registradas em poucos ou em nenhum estudo, estas espécies são de ampla valência ecológica no Cerrado e/ou outros domínios (BFG 2018).…”

Poaceae em uma planície de inundação no Brasil: distribuição espacial e conservação

“…Digitaria violascens, Echinochloa crus-galli, Hymenachne amplexicaulis, Leersia hexandra, Megathyrsus maximus, Panicum condensatum, Panicum dichotomiflorum, Panicum trichanthym, Setaria parviflora e Steichisma laxum são espécies de ampla distribuição em áreas úmidas do Brasil (Junk 1970;Silva et al 1983;Irgang et al 1984;Junk 1986;Pott et al 1986;Allem & Valls 1987;Oliveira et al 1988;Pedralli et al 1993a;Pedralli et al 1993b;Prado et al 1994;Irgang & Gastal Júnior 1996;Gastal Júnior & Irgang 1997;Pott & Pott 1997;Rosa & Irgang 1998;Pott & Pott 2000;Bove et al 2003;Rodrigues da Silva & Filgueiras 2003;Santos 2007;Terneus 2007;Amaral et al 2008;D´Angelo 2009;Rocha & Lins 2009;Araújo et al 2010;Alves et al 2011;Pott et al 2011;Medeiros et al 2012;Ferreira et al 2013;Moura Júnior et al 2013;Oliveira et al 2013;Rosseto & Vieira 2013;Shirasuna et al 2013;Bovini et al 2014;Rodrigues & Filgueiras 2014), na América do Sul (León & Young 1996;Arbo & Tressens 2005) ou ambientes associados ao Rio Paraná (Neiff 1986;Lewis et al 1987;…”

Florística e efeitos do regime de fogo no estrato herbáceo−subarbustivo no Jalapão, Tocantins, Brasil

“…Although Fabaceae is one of the most diverse families in Cerrado, the number of sampled species was much higher than for other families, this being unexpected in relation to other surveys (Mantovani and Martins 1993;Batalha et al 1997;Batalha and Mantovani 2001;Carvalho et al 2010;Amaral et al 2013). Medeiros et al (2012), sampling all Cerrado physiognomies in southern Tocantins and northern Goiás, found a similar proportion, suggesting this is not a collecting artifact, because Fabaceae species are normally very conspicuous and reproductive during long periods, favoring herbaria sampling. Chamaecrista, Bauhinia, and Mimosa are big genera, more diverse in the Cerrado (Irwin and Barneby 1982;Barneby 1991), which also contributes to the species number registered for the family.…”

“…Additional sampling in physiognomies still poorly known, such v gallery forests, seasonal dry forests, rocky-soil savannahs, highland wet-soil fields, may further increase species numbers, possibly reaching 1,000 species for the entire Jalapão region, as found in a survey that included all physiognomies from another Cerrado area in Tocantins state (Medeiros et al 2012). , followed by Bridgewater et al (2004), divided the Cerrado domain into six floristic provinces, based on floristic similarities of trees and large shrubs.…”