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Issue: Vol. 721 No. 2: 7 Oct. 2025
Type: Article
Published: 2025-10-07
DOI: 10.11646/phytotaxa.721.2.2
Page range: 118-144
Abstract views: 227
PDF downloaded: 15

Nomenclatural notes on Trichanthecium (Poaceae, Panicoideae, Paniceae)

Museu Paraense Emílio Goeldi, Avenida Perimetral 1901, Terra Firme, 66077-830, Belém, Pará, Brazil
Instituto de Botánica Darwinion, ANCEFN–CONICET, Labardén 200, B1642HYD San Isidro, Buenos Aires, Argentina
Instituto Nacional da Mata Atlântica, Avenida José Ruschi 4, 29650-000, Santa Teresa, Espírito Santo, Brazil
Isachne lectotype Panicum Sacciolepis grex clade typification Monocots

Abstract

Trichanthecium is a genus of panicoid grasses that occurs in tropical and subtropical areas of the Americas, continental Africa and Madagascar, comprising 52 species. Revisions of herbaria materials revealed the need for new typifications of names associated with Trichanthecium to stabilize the nomenclature of the genus. In this article, we designate lectotypes for 16 names (three in Isachne and 13 in Panicum) within ten species of Trichanthecium: Panicum cyanescens var. rigidiusculum (Trichanthecium cyanescens), P. dinklagei (T. dinklagei), P. pusillum var. glabriglumatum (T. glaucocladum), P. homblei (T. margaritiferum), Isachne kidumaensis, I. wombaliensis and P. fulgens (T. nervatum), P. perpusillum (T. polycomum), P. carinifolium and P. praealtum (T. praealtum), P. cyanescens var. latifolium (T. schwackeanum), I. sapinii and P. strictissimum (T. strictissimum), and P. drosocarpum, P. gemmeum and P. viciniflorum (T. tenellum). We also indicate a new synonym under T. tenellum: P. imbelle. Typification notes and images of the type-specimens are presented.

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How to Cite

Lopes-Neto, R.B., Zuloaga, F.O. & Viana, P.L. (2025) Nomenclatural notes on Trichanthecium (Poaceae, Panicoideae, Paniceae). Phytotaxa 721 (2): 118–144. https://doi.org/10.11646/phytotaxa.721.2.2