Flora do Rio de Janeiro: Lemnoideae (Araceae)

Abstract

Resumo Lemnoideae (Araceae) são ervas aquáticas flutuantes, extremamente reduzidas. Subcosmopolitas, geralmente são encontradas em ambientes lênticos de regiões tropicais. No Brasil ocorrem 15 espécies. Este estudo deslindou a subfamília Lemnoideae no estado do Rio de Janeiro, com base em trabalhos de campo e visitas a herbários. Foram registradas onze espécies: Landoltia punctata ocorre na restinga, floresta ombrófila, vegetação secundárias e áreas urbanizadas; Lemna aequinoctialis é amplamente distribuída no estado, ocorre na restinga, floresta ombrófila, vegetação secundárias e áreas urbanizadas; Lemna minuta e Lemna valdiviana ocorrem em restinga e floresta ombrófila; Spirodela intermedia e Wolffia arrhiza ocorrem apenas na restinga; Wolffia brasiliensis ocorre na restinga e floresta ombrófila; Wolffia cylindracea foi encontrada em vegetação secundária; Wolffia globosa ocorre em floresta ombrófila; Wolffiella neotropica e Wolffiella lingulata ocorrem apenas na restinga. Este trabalho disponibiliza descrições morfológicas, chaves de identificação, ilustrações e outras informações das espécies de Lemnoideae ocorrentes no Rio de Janeiro. As buscas em campo e a análise dos materiais revelaram três novas ocorrências para o estado e duas para o Brasil.

New occurrences of small aquatic duckweeds (Araceae, Lemnoideae) in Maranhão state, northeastern Brazil

“…The average annual temperature varies between 22 and 27 °C and average annual rainfall varies between 800 and 2,800 mm (IMESC 2008). The dry period varies from five to six months, from June to November/ December, when the water deficit reaches 150-300 mm (Golfari 1980;Jesus et al 1986), with the driest period between July and October and the highest concentration Species identifications were carried out with the aid of a binocular stereomicroscope Stemi DV4 ZEISS ® and specialized literature (Hegelmaier 1878;Landolt 1986;Pott and Cervi 1999;Pott 2002;Andrade et al 2013;Pereira et al 2016;Freitas et al 2017;Coelho 2018;Lourenço and Bove 2019) and also by comparison with herbarium specimens identified and deposited in the herbaria of NY, K, RB, MO, and BHCB (acronyms according to Thiers 2019). The names of the authors follow Brummitt and Powell (1992).…”

Structure and floristics of the plant community in Lagoa do São Bento, Maricá, Rio de Janeiro state, Brazil

“…The species were classified according to habits based on Barros (2009) in herbs, shrubs and trees. The new occurrences for the municipality of Maricá were verified based on the consultation made in the R, RB, and RFFP herbaria, in the online databases JABOT and speciesLink and in the studies of Gil & Bove (2007), Lourenço & Bove (2019), in addition to the volume 68 of Rodriguésia, which deals with 16 families occurring in aquatic environments in the state of Rio de Janeiro (Coelho et al 2017). Data on endemic species in Brazil and distribution in the five regions were obtained from Flora do Brasil 2020 (continuously updated).…”

“…A more comprehensive study was carried out by Bove et al (2003), listing the species of the coastal plain, presenting their biological forms and habitat. Another contribution was to the organization of the Flora of Rio de Janeiro, registering 17 families with aquatic plants (Coelho et al 2017;Lourenço & Bove 2019).…”

The complete chloroplast genome of Philodendron hederaceum (Jacq.) Schott 1829 (Alismatales: Araceae)

“…The species belonging to the Philodendron genus are mainly distributed in Brazil, where 168 species were reported (Coelho et al. 2016 ). While the inflorescence morphology of Philodendron is generally conserved, the leaf morphology and habitats of Philodendron exhibit a wide range of diversity (Coelho 2000 ; Coelho et al.…”

“…While the inflorescence morphology of Philodendron is generally conserved, the leaf morphology and habitats of Philodendron exhibit a wide range of diversity (Coelho 2000 ; Coelho et al. 2016 ). Philodendron species are classified into three subgenera based on floral and vegetative morphology (Mayo 1991 ; Croat 1997 ): the subgenus Meconostigma (Schott) Engl.…”