Synopsis of Sida (Malvoideae, Malvaceae) in the state of Rio Grande do Sul, Brazil Grings, Martin Boldrini, Ilsi Iob Phytotaxa 2022 2022-04-05 542 2 105 135 9V935 Krapovickas & Bueno (2014: 87) Krapovickas & Bueno 87 2014 [164,783,1022,1049] Magnoliopsida Malvaceae Sida Plantae Malvales 9 114 Tracheophyta species farroupilhensis    Holotype:— BRAZIL. Rio Grande do Sul: Farroupilha, “Parque dos Pinheiros, Parque dos Pinheiros, erva com aproximadamente  1 mde altura, bastante frequente nos lugares úmidos e sombreados, flores amarelas que se fecham ao ser coletadas”,  23 May 1978,  O. Bueno 676( HAS!; isotype CTES!).   Taxonomic notes:—  Sida farroupilhensisis distincted from other species of section  Sidae( Table 1) by the presence of aristae smaller than the mericarp body, mericarps dehiscent only at the apex, solitary flowers without bifid bracts, leaf blades ovate-rhombic and with simple trichomes in adaxial surface ( Figures 4A–F, 14C) ( Krapovickas 2014). A relevant diagnostic feature of the species is the reticulate leaf’s abaxial surface, formed by the tertiary veins, which is covered by sparse, small stellate trichomes. Calyx also with tertiary veins forming a characteristic reticulate and with very sparse small stellate trichomes. In the present work, photos of the species in its habitat are presented for the first time.   Distribution, habitat, and conservation status:—The species is endemic to Araucaria Forest of northeast of Rio Grande do Sul, Brazil( Figure 2), in the edges or understory of Forests, and rarely in Highland grassland. With an EOO of 3,813.842 Km² and an AOO of 40 km²  S. farroupilhensiscould be considered Endangered (EN). However, the species is usually abundant in places where it occurs and does not show subpopulations, locations, EOO and AOO declines or fluctuations. That is, the species does not meet the conditions B (a), B(b) and B(c) and is considered Least Concern (LC).   Representative specimens:—  BRAZIL. Rio Grande do Sul. Canela, Flona, WGS 84 - 29.321389°S- 50.816667°W,  23 March 2019,  F .   Gonzatti5061( HUCS);  Caxias do Sul, Bairro Nossa Senhora do Rosário, WGS 84 - 29.130833°S- 51.154167°W,  29 September 2019,  M .   Grings2078( ICN); Gramado, Bairro Moura,  06 May 2020,  M .   Grings2130( ICN); São Francisco de Paula, próximo ao lago São Bernardo, WGS 84 - 29.459764°S- 50.570602°W,  08 June 2012,  M .   Grings2112( ICN); Vacaria, Parque de Rodeios, WGS 84 - 28.481828°S- 50.910969°W,  27 April 2019,  M .  Grings& A. S.   Mello2034( ICN). 3746876331 1978-05-23 O, HAS, CTES Brazil 1 Rio Grande do Sul 9 114 1 Rio Grande do Sul holotype 3746876406 2019-03-23 F Canela & Flona Brazil -29.321388 Rio Grande do Sul 1 -50.816666 9 114 1 Rio Grande do Sul 3746876390 [347,610,1670,1697] HUCS Gonzatti Brazil 9 114 1 Rio Grande do Sul 3746876415 2019-09-29 M Brazil -29.130833 Bairro Nossa Senhora do Rosario 1 -51.154167 9 114 1 Caxias do Sul 3746876374 [580,1297,1706,1733] 2020-05-06 ICN, M Grings Brazil Bairro Moura Gramado 9 114 1 Caxias do Sul 3746876369 2012-06-08 ICN, M Grings Brazil -29.459764 Sao Bernardo 1 -50.570602 Sao Francisco de Paula 9 114 1 Caxias do Sul 3746876436 [173,1363,1778,1805] 2019-04-27 ICN, M Grings Brazil -28.481829 Parque de Rodeios 1 -50.91097 Vacaria 9 114 1 Caxias do Sul 3746876358 A, S Grings Brazil 9 114 1 Caxias do Sul 3746876377 [216,422,1814,1840] ICN Mello Brazil 9 114 1 Caxias do Sul