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Riencourtia Cass., Dict. Sci. Nat. 45: 466 (1827). [Originally published as Riencurtia Cass, Bull. Soc. Philom. Paris 1818: 76 (1818), based on R. spiculifera (= R. pedunculosa (Rich.) Pruski).]

Pontesia Vell., Fl. Flum. 8: t. 147 (1825)[7 Sept. - 28 Nov. 1829]. Type: Pontesia serrata Vell. = ?Riencourtia latifolia Gardner

Tetrantha Poit. ex DC., Prodr. 5: 693 (1836) [originally appearing as Petrantha Poit. on p. 503], nom. nud. pro syn.

Tetrantha Poit. ex Baker in Mart., Fl. Bras. 6(3): 143 (1884), nom. nud. pro syn.

Type: Riencurtia spiculifera Cass. = Riencourtia pedunculosa (Rich.) Pruski

Note: As originally published in 1818 Cassini proposed the name Riencurtia, a name used several times up until Dict. Sci. Nat. 38: 18 (Dec. 1825). However, in Dict. Sci. Nat. 45: 466 (1827) Cassini used the variant spelling, Riencourtia for the first time. Since the genus was named after his wifes family name, as explained by King & Dawson (1975) in the Introduction to Cassini on Compositae, this correction is accepted.

Riencourtia angustifolia Gardner, London J. Bot. 7: 287 (1848) = Riencourtia oblongifolia Gardner

Riencourtia oblongifolia Gardner, London J. Bot. 7: 287 (1848). Type: Hab. Arid bushy places near Natividade, Province of Goyaz. Dec., 1839. [Gardner] 3279.

Riencourtia angustifolia Gardner, London J. Bot. 7: 287 (1848). Type: Hab. Dry Campos near Natividade, Province of Goyaz. Dec., 1839. [Gardner] 3278.

Leiomphalus aggregatus Less. ex Baker in Mart., Fl. Bras. 6(3): 144 (1884), nom. nud. pro syn.

Riencourtia oblongifolia Gardner var. angustifolia (Gardner) Baker in Mart., Fl. Bras. 6(3): 144 (1884).

Bolivia (Santa Cruz), Brazil.

Rolandra reptans Willd. ex Less., Linnaea 4(3): 343 (1829), nom. nud. pro syn. = Trichospira verticillata (L.) S. F. Blake

Rolandra terminalis Spreng., Syst. Veg., ed. 16, 3: 673 (1826) = Icthyothere terminalis (Spreng.) S. F. Blake

Rothia degenerica Kuntze, Revis. Gen. Pl. 3(3): 169 (1898) = Schkuhria degenerica (Kuntze) R. E. Fr.

Rothia intermedia Kuntze, Revis. Gen. Pl. 3(3): 170 (1898) = Schkuhria multiflora Hook. & Arn.

Rothia pinnata (Lam.) Kuntze, Revis. Gen. Pl. 3(3): 170 (1898) = Schkuhria pinnata (Lam.) Kuntze ex Thell.

Rothia pinnata (Lam.) Kuntze a pallida Kuntze, Revis. Gen. Pl. 3(3): 170 (1898), pro parte = Schkuhria pinnata (Lam.) Kuntze ex Thell.

Rothia pinnata (Lam.) Kuntze b purpuascens Kuntze, Revis. Gen. Pl. 3: 170 (1898), pro parte = Schkuhria pinnata (Lam.) Kuntze ex Thell.

Rothia pusilla (Wedd.) Kuntze, Revis. Gen. Pl. 3(3): 170 (1898) = Schkuhria multiflora Hook. & Arn.

?Rudbeckia densifolia Sm., in Rees, Encycl. : 30 (1819) = Viguiera anchusifolia (DC.) Baker

Sabazia microglossa DC., Prodr. 5: 497 (1836) = Galinsoga parviflora Cav.

Sabazia microglossa DC. var. b puberula DC., Prodr. 5: 497 (1836) = Galinsoga parviflora Cav.

Sabazia urticifolia (Kunth) DC., Prodr. 5: 497 (1836) = Galinsoga quadriradiata Ruiz & Pav.

Sabazia urticifolia (Kunth) DC. var. venezuelensis Steyerm., Fieldiana, Bot. 28: 672 (1953) = Galinsoga quadriradiata Ruiz & Pav.