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) .