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| Phyllanthus rosellus (Müll.Arg.) Müll.Arg. in Torres et Silva, 2024. |
Abstract
Phyllanthus rosellus, an endemic species from the state of Minas Gerais, Brazil, was treated under Phyllanthus niruri subsp. lathyroides. After analyzing herbarium collections, including all types related to the names P. niruri and P. rosellus, we conclude that both species are morphologically distinguishable, and consequently we propose the reinstatement of P. rosellus. Additionally, as the latter is a species usually known from literature dating from the 19th century, where its description overlaps with that of some congeners, we provide its description, illustrations, preliminary conservation status, images in their habitat, as well as designate a lectotype for it.
Eudicots, Atlantic Forest, Cerrado, Phyllanthus subsect. Phyllanthus, taxonomy
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| Phyllanthus rosellus. A. Habit. B. Stem. C. Cataphylls. D and E. Fertile branches, showing small leaves and male flowers on the adaxial surface. F and G. Detail of the unisexual branchlet, showing the pink staminate flowers, with three free stamens. H. Pistillate flower. I. Detail of the pistillate disk and styles J. Seed [Photos A, and F by João Paulo Zorzanelii, B, D, E and G by Paulo Sampaio and C, H, I and J by Alícia Torres]. |
Phyllanthus rosellus (Müller Argoviensis) Müller Argoviensis (1873:53).
≡ Phyllanthus lathyroides f. rosellus MüllerArgoviensis (1863:42)
≡ Diasperus rosellus (Müller Argoviensis) Kuntze (1891:601).
Alícia Marques TORRES and Marcos José da SILVA. 2024. Reinstatement and Lectotypification of Phyllanthus rosellus (Phyllanthaceae), an endemic species from the State of Minas Gerais, Brazil. Phytotaxa. 645(3); 259-269. DOI: doi.org/10.11646/phytotaxa.645.3.5 [2024-04-26]