Taxonomic notes on Cyperus (Cyperaceae: Cypereae) from northeastern Brazil Author Matzenauer, William 0000-0002-3451-4611 wmatzenauer @ gmail. com; https: // orcid. org / 0000 - 0002 - 3451 - 4611 wmatzenauer@gmail.com Author Pereira-Silva, Luciana 0000-0003-0455-8215 silvapeluciana @ gmail. com; https: // orcid. org / 0000 - 0003 - 0455 - 8215 silvapeluciana@gmail.com Author Hefler, Sonia M. 0000-0001-7985-3177 soniahefler @ furg. br; https: // orcid. org / 0000 - 0001 - 7985 - 3177 soniahefler@furg.br Author Alves, Marccus 0000-0001-9281-2257 Departamento de Botânica, Universidade Federal de Pernambuco, 50670 - 901, Recife, Pernambuco, Brazil. & alves. marccus @ gmail. com; https: // orcid. org / 0000 - 0001 - 9281 - 2257 alves.marccus@gmail.com text Phytotaxa 2022 2022-12-22 576 3 297 300 http://dx.doi.org/10.11646/phytotaxa.576.3.6 journal article 54550 10.11646/phytotaxa.576.3.6 c4f58cd3-9da9-44ed-8216-8ddf1c2a3119 1179-3163 7471643 Cyperus potiguar Ribeiro et al. (2015: 154) . Type:— BRAZIL . Rio Grande do Norte : Jucurutu , Serra Jo„o do Vale , 06º00’43”S , 37º08’52”W , 29 May 2010 , A. R. O. Ribeiro et al. 247 ( holotype UB- 207815!, isotypes HUEFS-209004!, MOSS-13636!, RB-605130!). Cyperus planifolius var. pickelii R.Gross ex Ķk. (1936: 447). Type :— BRAZIL . Pernambuco , [Gravatá], Russinha , on wet place, 12 February 1935 , B. Pickel 3779 ( lectotype IPA-3311! designated here, isolectotype US-3202923!). Syn. nov. Figs. 1 C-D. Additional specimens examined: BRAZIL . Ceará : Maranguape , Açude S „o Bento , 5 August 1935 , F. E. Drouet 2187 (US-3202924!) ; Paraíba : Campina Grande , on wet place, 24 June 1935 , B. Pickel 3995 (IPA-3313!) ; Pernambuco : [Gravatá], Russinha , 26 March 1934 , B. Pickel 3591 (IPA-3310!, IPA-6227 not seen), [Gravatá], Russinha, in the caatinga, between bromelias, 1 May 1935 , B. Pickel 3913 (IPA-6238 not seen, US-3202921!, US-32022922!)