Abstract
During the preparation of a taxonomic revision of Rhynchospora sect. Longirostres, we found several scientific names that needed to be lectotypified or neotypified. In addition, Rhynchospora amazonica subsp. guianensis is being recognized at the level of species and requires a new name, Rhynchospora rionegrensis. This species is described and illustrated and differs from R. amazonica by its lateral and terminal, generally turbinate inflorescences, brown spikelet scales, loose fascicles, and longer stylopodium. Lectotypes are chosen for Calyptrostylis longirostris (the basionym of R. rionegrensis), R. amazonica, and R. macrostachya, and a neotype chosen for R. stenocarpa.
References
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Buddenhagen, C.E., Thomas, W.W. & Mast, A.R. (2017) A First Look at Diversification of Beaksedges (Tribe Rhynchosporeae; Cyperaceae) in Habitat, Pollination, and Photosynthetic Features. Memoirs of the New York Botanical Garden 118: 113–126.
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<a href="https://doi.org/10.1002/fedr.19400490505">https://doi.org/10.1002/fedr.19400490505</a>
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Thomas, W.W., Araújo, A.C. & Alves, M. (2008) A Preliminary Molecular Phylogeny of the Rhynchosporeae (Cyperaceae). Cyperaceae–Special Issue. Botanical Review 75: 22–29.
Torrey, J. (1836) Monograph of the North American Cyperaceae. Annals of the Lyceum Natural History, New York 3: 239–443.
Vahl, M. (1805) Enumeratio Plantarum vel ab aliis, vel ab ipso observatarum, cum earum differentiis specificis, synonymis selectis et descriptionibus succinctis. Enumeratio Plantarum 2. Typis N. Mölleri et Filii, Aulae Regiae et Universitatis Typographorum, Impensis Viduae, Hauniae, 436 pp.
Viji, A.R., Shaju, T. & Geethakumary, M.P. (2014) Rhynchospora panduranganii (Cyperaceae), a new sedge species from the Western Ghats of the Nilgiri Biosphere Reserve, India. Kew Bulletin 69: 9519.
<a href="https://doi.org/10.1007/s12225-014-9519-8">https://doi.org/10.1007/s12225-014-9519-8</a>
Weber, P. (2020) Estudo Taxonômico e Filogenético do gênero Rhynchospora (Cyperaceae) Seção Longirostres. Ph.D. thesis. Universidade Federal do Rio Grande do Sul. Porto Alegre, Brazil, 188 pp.
Britton, N.L. (1892) A list of the species of the genera Scirpus and Rhynchospora occuring in North America. Transactions of the New York Academy of Sciences 11 (3–5): 74–123.
Buddenhagen, C.E., Thomas, W.W. & Mast, A.R. (2017) A First Look at Diversification of Beaksedges (Tribe Rhynchosporeae; Cyperaceae) in Habitat, Pollination, and Photosynthetic Features. Memoirs of the New York Botanical Garden 118: 113–126.
Costa, A.C.G., Thomas, W.W. & Machado, I.C. (2017) Comparative floral biology of Rhynchospora ciliata (Vahl) Kükenth. and R. pubera (Vahl) Boeckeler (Cyperaceae): the role of white involucral bracts in attracting pollinating insects. Plant Species Biology 32 (4): 403–411.
Elliott, S. (1816) A Sketch of the Botany of South-Carolina and Georgia. Vol. 1, J.R. Schenck, Charleston. 606 pp.
Gray, A. (1835) A monograph of the North American species of Rhynchospora. Annals of the Lyceum of Natural History 3: 191–220.
Guaglianone, E.R. (2001) Contribuición al Estudio del género Rhynchospora (Cyperaceae) V. Sección Longirostres en América Austral. Darwiniana 39: 287–342.
JSTOR (2020) Global Plants Database. [http://plants.jstor.org/]
Koyama, T. (1972) Cyperaceae-Rhynchosporeae and Cladieae. In: Maguire, B. (Ed.) The botany of the Guayana Highland-Part 9. Memoirs of the New York Botanical Garden 23, pp. 23–89.
Kükenthal, G. (1949) Vorarbeiten zu einer Monographie der Rhynchosporoideae-Rhynchospora. Botanisches Jahrbücher fur Systematik, Pflanzengeschichte und Pflanzengeographie 74: 375–509.
Kunth, C.S. (1837) Enumeratio plantarum. 2. Cyperographia Synoptica sive enumeratio Cyperacearum. J.G. Cotta, Stuttgart, 591 pp.
Lindeman, J.C. & Van Donselaar, J. (1971) Taxonomy, Ecology, and Distribution of Rhynchospora (Cyp.) in Suriname. Acta Botanica Neerlandica 20: 428–450.
Macbride, J.F. (1931) Spermatophytes, Mostly Peruvian III. Publications of the Field Museum of Natural History, Botanical Series 11 (1): 1–35.
Moore, G. (1997) A Taxonomic Investigation of Rhynchospora Section Longirostres Kunth. Ph. D. Dissertation. Vanderbilt University. Nashville, Tennessee, USA, 298 pp.
Nees von Esenbeck, C.G.D. (1840) Cyperaceae of Schomburgk. Journal of Botany, Being a Second Series of the Botanical Miscellany 2: 393–399.
Nees von Esenbeck, C.G.D. (1842) Cyperaceae. Flora Brasiliensis 2 (1): 110–147.
Pfeiffer, H.H. (1940) Decas Cyperacearum criticarum vel emendatarum V. Repertorium Novarum Specierum Regni Vegetabilis, 49(5–12): 74–84.
<a href="https://doi.org/10.1002/fedr.19400490505">https://doi.org/10.1002/fedr.19400490505</a>
Steudel, E.G. (1855) Synopsis Plantarum Glumacearum. J.B. Metzler, Stuttgart, 475 pp.
Strong, M.T. (2006) Taxonomy and distribution of Rhynchospora (Cyperaceae) in the Guianas, South America. Contributions from the United States National Herbarium 53: 1–225.
Thiers, B. (2020) Index Herbariorum: a global directory of public herbaria and associated staff [online]. New York Botanical Garden’s Virtual Herbarium. Available from: <a href="http://sweetgum.nybg.org/ih/">http://sweetgum.nybg.org/ih/</a> (accessed May 2020)
Thomas, W.W., Araújo, A.C. & Alves, M. (2008) A Preliminary Molecular Phylogeny of the Rhynchosporeae (Cyperaceae). Cyperaceae–Special Issue. Botanical Review 75: 22–29.
Torrey, J. (1836) Monograph of the North American Cyperaceae. Annals of the Lyceum Natural History, New York 3: 239–443.
Vahl, M. (1805) Enumeratio Plantarum vel ab aliis, vel ab ipso observatarum, cum earum differentiis specificis, synonymis selectis et descriptionibus succinctis. Enumeratio Plantarum 2. Typis N. Mölleri et Filii, Aulae Regiae et Universitatis Typographorum, Impensis Viduae, Hauniae, 436 pp.
Viji, A.R., Shaju, T. & Geethakumary, M.P. (2014) Rhynchospora panduranganii (Cyperaceae), a new sedge species from the Western Ghats of the Nilgiri Biosphere Reserve, India. Kew Bulletin 69: 9519.
<a href="https://doi.org/10.1007/s12225-014-9519-8">https://doi.org/10.1007/s12225-014-9519-8</a>
Weber, P. (2020) Estudo Taxonômico e Filogenético do gênero Rhynchospora (Cyperaceae) Seção Longirostres. Ph.D. thesis. Universidade Federal do Rio Grande do Sul. Porto Alegre, Brazil, 188 pp.