Podostemaceae in Southern Brazil

Abstract

This study provides a taxonomic treatment of the Podostemaceae family in southern Brazil. Podostemaceae is the largest family of strictly aquatic angiosperms. The center of family richness is the equatorial region of South America. Taxonomic studies are still scarce in Brazil. For southern Brazil there are six genera and 10 species recognized. Dichotomous key and illustrations are presented for species identification.

Silica bodies in leaves of neotropical Podostemaceae: taxonomic and phylogenetic perspectives

“…Our results corroborate the location of silica bodies reported in the literature for the following species: Apinagia richardiana (Schnell, 1967), Diamantina lombardii (Rutishauser et al, 2005;da Costa et al, 2011), Podostemum ceratophyllum (Warming, 1881), P. scaturiginum (Warming, 1899), Tristicha trifaria (Cario, 1881;da Costa et al, 2011) and Weddellina squamulosa (Wächter, 1897;Koi and Kato, 2007;da Costa et al, 2011). Mello et al (2011), in their taxonomic work, treated the outgrowths on the adaxial leaf surface of Mourera aspera as papillae and mentioned that these structures are composed of a set of siliceous cells. In our studies, we found silica bodies in the outgrowths and in subepidermal cells of Mourera aspera and M. fluviatilis.…”

Paracladopus chiangmaiensis (Podostemaceae), a new generic record for China and its complete plastid genome

“… Podostemaceae , also known as river-weeds or podostems ( Gustafsson et al 2002 ; Koi and Kato 2012 ), which are the largest family of strictly aquatic angiosperms ( De Mello et al 2011 ), grow attached to waterworn rock surfaces, stones or even wood in rapids and waterfalls with pristine hydrology and high water quality ( Rutishauser 1995 ; Koi and Kato 2020 ; Xue et al 2020 ). They are found worldwide in rivers or streams with open and sunny habitats ( Werukamkul et al 2016 ), but distributed mainly in the tropical to warm-temperate regions with seasonal climates ( Kato 2011 ).…”

“…They are found worldwide in rivers or streams with open and sunny habitats ( Werukamkul et al 2016 ), but distributed mainly in the tropical to warm-temperate regions with seasonal climates ( Kato 2011 ). The species diversity center of river-weeds is located in the equatorial region of South America ( De Mello et al 2011 ). Its habitat and morphology have obviously undergone high specializations and extensive reductions ( Gustafsson et al 2002 ).…”

Check-List Da Família Podostemaceae Do Estado Do Mato Grosso Do Sul, Brasil

“…Contribuições mais recentes à sistemática do grupo foram publicadas por Alejandro Novelo e Thomas Philbrick (Novelo & Philbrick 1993a, b, 1995, 2004 enfocando principalmente os representantes da América do Norte (Estados Unidos e México); por Nuncia Tur (Tur 1975(Tur , 1984(Tur , 1987(Tur , 1997(Tur , 1999 para os grupos que ocorrem na Argentina e Paraguai e Anabel Rial para a Venezuela (Rial & Bove 2007). No Brasil, Aldaléa Tavares (1997) estudou as espécies ocorrentes em rios de água preta do estado do Amazonas e, com colaboradores (Mello et al 2011), realizou o tratamento taxonômico para os representantes da região Sul. No século XXI dois gêneros e onze espécies novas foram descritos para o Brasil (Philbrick & Novelo 2001, 2004, Philbrick et al 2004a, 2004bTavares et al 2015 a,b,c).…”

“…Até o momento, três gêneros foram revisados: Castelnavia (Philbrick et al 2009), Lophogyne (Bove et al 2011) e Podostemum (Philbrick & Novelo 2004). Listagens e floras regionais , Mello et al 2011 ou para os neotrópicos (Bove & Philbrick 2010) também têm sido o foco de atenção na busca da real diversidade do grupo .…”