Zornia orbiculata Mohlenbr., Webbia

Zornia orbiculata Mohlenbr., Webbia 16 (1): 118. 1961. Fig. S3 Type: ARGENTINA. Misiones: Candelaria, San Juan, 9 June 1947, Schwindt 301 (holotype LIL–000655!, isotype CTES–0000692!). Shrub to ca. 30 cm tall. Stems prostrate, branched, glabrous. Leaves with 2 leaflets, petiolate. Leaflets 7–15 × 3–12 mm, orbiculate, glabrous. Stipules lanceolate, 5–7 veined. Inflorescences spiciform, axillary, 25 cm long. Bracteoles 5–10 × 2–5 mm, ovate, 3–7 veined, punctate, glabrous, green. Loment with 3–8 articles; articles 2–2.5 × 1.5–2 mm, not reticulate-veined, bristle-like trichomes 1 mm long. Distribution and habitat: Argentina, Bolivia, Brazil, Peru, Uruguay. It occurs in Savanna. Conservation Status: Near Threatened (NT). While Zornia orbiculata has a relatively wide distribution, it is primarily found in Pampa vegetation of southern Brazil (EOO= 3,118,467.452 km ²; AOO= 248.000 km ²). Notes: Zornia orbiculata can be easily identified by its leaves with two orbiculate leaflets. Representative specimen examined: ARGENTINA. Corrientes: Dep. Ituzaingo, 4 March 1987, A. Krapovickas et al.41101 (K). BRAZIL. Rio Grande do Sul: Caçapava do Sul, 13 December 1997, R. Wasum et al. 12237 (M).