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| Phyllanthus celatus J.C.R. Mendes, J.M.A. Braga & Fraga, in Mendes, Braga, Fraga, Tomazello-Filho, Orlandini et Athiê-Souza. 2024. |
Abstract
A new and critically endangered species of Phyllanthus, endemic to the Parque Nacional da Tijuca in Rio de Janeiro State, Brazil, is described and illustrated here. Phyllanthus celatus is placed in Phyllanthus subgenus Phyllanthus section Phyllanthus subsection Phyllanthus. Morphologically it resembles P. augustinii, P. lobatus and P. niruri, but differs mainly by presenting reddish primary, secondary and intersecondary veins on the abaxial surface (vs absent in both species), and 5-lobed pistillate disc (vs entire only in P. augustinii and P. niruri). Of these, only P. lobatus has a lobed disc, but it differs in pistillate sepals light green (vs whitish or slightly pinkish), deeply 5-lobed pistillate glandular disc (vs 3–5-lobed), styles erect (vs curved), and geographic distribution restricted to the Southeast (vs South). The systematic position of this species and its morphological relationships with allies are discussed and field photographs, illustrations, a distribution map, preliminary conservation status, and taxonomic notes are provided.
Eudicots, Malpighiales, neotropics, Phyllanthoideae, taxonomy
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| Phyllanthus celatus. A. Habitat, B. Habit, C. Branches showing both leaf surfaces (adaxial and abaxial), D. Pistillate flowers with details, E. Developed fruits. (Photographs by J.C.R. Mendes). |
Phyllanthus celatus J.C.R. Mendes, J.M.A. Braga & Fraga, sp. nov.
Etymology:—The specific epithet is a Latin adjective meaning hidden away. It is allusive to the discovery of this species that stayed unknown for centuries in the shadows of the forest, in a place intensely explored by historic and current botanists.
Jone Clebson Ribeiro Mendes, João Marcelo Alvarenga Braga, Claudio Nicoletti de Fraga, Mario Tomazello-Filho, Priscila Orlandini and Sarah Maria Athiê-Souza. 2024. A New Species of Phyllanthus (Phyllanthaceae) hiding in the shades in an urban Atlantic Forest in Rio de Janeiro State, Brazil. Phytotaxa. 660(3); 278-286. DOI: doi.org/10.11646/phytotaxa.660.3.5 Researchgate.net/publication/382488487_A_new_species_of_Phyllanthus_hiding_in_the_shades_in_an_urban_Atlantic_Forest_Brazil
Researchgate.net/scientific-contributions/Joao-Marcelo-Alvarenga-Braga-30580335
