Synopsis of Sida (Malvoideae, Malvaceae) in the state of Rio Grande do Sul, Brazil Author Grings, Martin Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul, 91501 - 970, Brazil. Author Boldrini, Ilsi Iob Programa de Pós-Graduação em Botânica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, Rio Grande do Sul, 91501 - 970, Brazil. text Phytotaxa 2022 2022-04-05 542 2 105 135 http://dx.doi.org/10.11646/phytotaxa.542.2.1 journal article 53645 10.11646/phytotaxa.542.2.1 8b5747ec-68d6-4c6a-a1a0-c0c1152b45cc 1179-3163 6415487 8. Sida linifolia Cav. (1785: 14) ( Figures 4G–J , 5 , 14H ). Lectotype (designated by Fryxell 1988: 398 ):—“In insula Caienae et Peru ” , Jussieu s.n . ( P barcode 00680406! [digital image]; isolectotypes P barcode 05435313! [digital image], P barcode 05435312! [digital image]). Taxonomic notes: — Sida linifolia is a species of section Stenindae ( Table 1 ), easily distinguished from other species of the genus by its entire, narrowly linear or broadly lanceolate leaf blades and by the indehiscent mericarps ( Figures 4G–J , 14H ). Distribution, habitat and conservation status: —The species is widely distributed, from Mexico to Brazil , in parts of Africa, and Fiji ( Fryxell 1985 ). In Brazil Sida linifolia occurs in all states ( Bovini 2020 ) and in Rio Grande do Sul only in two localities in Inland sub-montane grassland ( Figure 5 ). The species is here considered Least Concern (LC) because it has large EOO and AOO, since it is a frequent and often ruderal species and is present in more than one continent. Representative specimens: — BRAZIL . Rio Grande do Sul . Guaíba , Fazenda São Maximiano , BR-116, Km 308, 07 June 1998 , N . I . Matzenbacher 2287 ( ICN ); ibidem, 22 April 2006 , L . F . Lima s.n. ( ICN 153925 ); Sapiranga , Cabanha Itapema , 22 April 2006 , C . Mondin 3106 ( MPUC ) .