High richness, new occurrences, and threatened species in a savanna grassland remnant in the largest Brazilian metropolis Author Camargo Keller, Victor Author Lopes Pereira-Silva, Erico Fernando Author Hardt, Elisa text Check List 2021 2021-03-16 17 2 507 549 http://dx.doi.org/10.15560/17.2.507 journal article 10.15560/17.2.507 1809-127X Hydrocotyle pusilla A.Rich. Identification. Small prostrate herb, pubescent stem. Characterized by its alternate, simple, peltate, orbicular, and glabrous leaves, with 3–20 mm in diameter. Flowers white, in a 3–10-flowered simple umbel. Remarks. A rare species found at grassland edges near anthropized areas. Considered Presumably Extinct in São Paulo state . Brazilian range. Midwest (MS state), Northeast (BA state), South and Southeast (except ES state) regions. Material examined. BRAZIL – São Paulo • Franco da Rocha , Parque Estadual do Juquery ; 23°20′42″S , 046°42′06″W ; 2 Oct. 2018 ; collection number vck324; HUFABC2033 . Polygalaceae