Bengt-jonsellia Al-Shehbaz is described as a new genus endemic to Madagascar, and the new combinations B. laurentii (Jonsell) Al-Shehbaz and B. tsaratananae (Jonsell) Al-Shehbaz are proposed. The characters distinguishing Bengt-jonsellia from Nasturtium and Rorippa are discussed, and detailed descriptions of the genus and a key to its two species are provided.

We report here the first record of Zinowiewia (Celastraceae) for the Brazilian flora, based on a specimen of Z. australis collected in Serra do Surucutus, at 1000–1400 m, Roraima state, in the basin of the Rio Branco and subsequently the Rio Negro, the latter being the largest tributary of the Amazon River. This novelty will be added to the Brazilian Flora 2020 project. With this addition, the family is now represented in Brazil by 20 genera and 142 species. An account of the history of Zinowiewia is also provided.

Randia tafallana is here proposed as a new name for Mussaenda parvifolia Tafalla ex Estrella, a species published in Flora Huayaquilensis (1989) and a later homonymous of Mussaenda parvifolia Miq. (1867). The present status of the populations of Randia tafallana is unknown.

Odontonema guayaquilense, a new species of subshrub of Acanthaceae from the remnant deciduous dry forests of Guayaquil, in coastal Ecuador, is here described and illustrated. The new species is assessed as Endangered EN B1ab(iii).

Albert Mocquerys, a commercial collector of natural history specimens, visited Venezuela from September 1893 through May 1894 and collected a wide range of organisms; plants, birds, insects, fishes, mammals, and fossil shells. Walter Rothschild evidently was his principal zoological patron and Emmanuel Drake del Castillo his botanical one. In Venezuela, Mocquerys established himself at Puerto Cabello and made three trips inland. The first was to localities near Barquisimeto; the second to the cave of the “guácharo” near Caripe; and the third was to the Venezuelan Andes near Mérida. Details concerning his collections and their present-day whereabouts are presented as is a gazetteer of localities associated with his collecting trips. Biographical data also clarify that Mocquerys was the third generation of a family of French dental surgeons, all of whom were accomplished naturalists with a special interest in entomology.

An additional fifty new species of Stelis from Colombia are described and illustrated in this the third of a series that includes those not identified when compared with any of the previously known species.

Ocotea batata, a new species from the Brazilian Atlantic rain forest of Bahia and Espírito Santo States is described and illustrated. Its relationships within the genus are discussed.

Cousinia azmarensis (Asteraceae, Cardueae), an endemic species from Kurdistan region (Iraq), is described and illustrated, and its distinguishing characters are discussed. It is easily separated from closest relatives C. cymbolepis DC. by having 115–125 flowers per head (vs. 80–90), heads 3.5–5.5 cm in diameter (vs. 3–4 cm), purple corolla (vs. pink), and 4–5 spines on each side of median bracts (vs. 2 or 3). It differs from C. qandilica by having 115–125 flowers per head (vs. 80–120), heads 3.5–5.5 cm in diameter (vs. 3–4), purple corolla (vs. yellow), and 4–5 spines on each side of median bracts (vs. 2 or 3). Cousinia calocephala is recorded herein for the first time in Iraq.