Novelties in Cactaceae from Eastern Brazil: Adding two new species and one new nothospecies to Tacinga (Opuntioideae) Author Freitas, Juliana Gomes 0000-0002-8774-5333 Instituto Nacional do Semiárido - INSA, Av. Francisco Lopes de Almeida s / n, Serrotão, 58434 - 700, Campina Grande, Paraíba, Brasil. University of Brasília, Secretaria da Coordenação de Pós-Graduação em Botânica - Caixa Postal 04457, CEP 70919 - 970, Brasília, DF, Brazil. & julebiologia @ gmail. com; https: // orcid. org / 0000 - 0002 - 8774 - 5333 julebiologia@gmail.com Author Alves, Lania Isis Ferreira 0000-0002-4182-911X Instituto Nacional do Semiárido - INSA, Av. Francisco Lopes de Almeida s / n, Serrotão, 58434 - 700, Campina Grande, Paraíba, Brasil. University of Brasília, Secretaria da Coordenação de Pós-Graduação em Botânica - Caixa Postal 04457, CEP 70919 - 970, Brasília, DF, Brazil. & laniaisis @ yahoo. com. br; https: // orcid. org / 0000 - 0002 - 4182 - 911 X laniaisis@yahoo.com.br Author Zappi, Daniela Cristina 0000-0001-6755-2238 danielazappi 14 @ gmail. com; https: // orcid. org / 0000 - 0001 - 6755 - 2238 danielazappi14@gmail.com Author Almeida, Erton Mendonça De 0000-0001-8033-5334 Laboratório de Citogenética e Evolução Vegetal, Departamento de Botânica, Centro de Biociências, Universidade Federal de Pernambuco, 50670 - 901, Recife, Pernambuco, Brasil. & Jardim Botânico da Usina de Arte, Rua da Praça s / n, distrito Santa Terezinha, 55552 - 970, Água Preta, Pernambuco, Brasil. & notre 0 @ hotmail. com; https: // orcid. org / 0000 - 0001 - 8033 - 5334 notre0@hotmail.com Author Peraza-Flores, Lizandro N. 0000-0001-9534-0523 Instituto Nacional de Pesquisas da Amazônia - INPA, Av. André Araújo 2936, Petrópolis, 69067 - 375, Manaus, Amazonas, Brasil. & lizandropf @ gmail. com; https: // orcid. org / 0000 - 0001 - 9534 - 0523 lizandropf@gmail.com Author Amaral, Daniel Oliveira Jordão Do 0000-0002-7171-433X Instituto Nacional do Semiárido - INSA, Av. Francisco Lopes de Almeida s / n, Serrotão, 58434 - 700, Campina Grande, Paraíba, Brasil. University of Brasília, Secretaria da Coordenação de Pós-Graduação em Botânica - Caixa Postal 04457, CEP 70919 - 970, Brasília, DF, Brazil. & daniel. amaral @ insa. gov. br; https: // orcid. org / 0000 - 0002 - 7171 - 433 X daniel.amaral@insa.gov.br Author Araújo, Daniel Bruno Pereira 0000-0002-1582-1333 Sítio cajazeiras s / n, área rural, 58400 - 000, Campina Grande, Paraíba, Brasil. & dbrunokn @ yahoo. com. br; https: // orcid. org / 0000 - 0002 - 1582 - 1333 dbrunokn@yahoo.com.br Author Batista, Fabiane Rabelo Da Costa 0000-0003-3868-1131 Instituto Nacional do Semiárido - INSA, Av. Francisco Lopes de Almeida s / n, Serrotão, 58434 - 700, Campina Grande, Paraíba, Brasil. University of Brasília, Secretaria da Coordenação de Pós-Graduação em Botânica - Caixa Postal 04457, CEP 70919 - 970, Brasília, DF, Brazil. & fabiane. costa @ insa. gov. br; https: // orcid. org / 0000 - 0003 - 3868 - 1131 fabiane.costa@insa.gov.br text Phytotaxa 2021 2021-03-16 490 3 239 252 http://dx.doi.org/10.11646/phytotaxa.490.3.2 journal article 10.11646/phytotaxa.490.3.2 1179-3163 5756420 Key to species of Tacinga 1. Plants scandent, stem-segments 25–70 cm long, cylindric or slightly flat at apex ............................................................................2 - Plants erect, decumbent or creeping, stem-segments 3–22 cm long, usually flat ..............................................................................3 2. Stem-segments completely cylindric, reddish; flower segments yellowish to brownish, sometimes purplish, anthers darkening after anthesis, style longer than stamens, pericarp with glochids 0.3–0.4 cm long, areoles without woolly hairs ........... Tacinga funalis . - Stem-segments cylindric, the distal ones flat toward apex, dark green or purplish, flower segments light green or whitish, anthers whitish green, style as long as the stamens, pericarp with glochids 0.1–0.2 cm long, areoles with woolly hairs ............................... ................................................................................................................................................................................... Tacinga braunii 3. Plants spiny.........................................................................................................................................................................................4 - Plants unarmed .................................................................................................................................................................................11 4. Stem-segments, pericarp and fruits with whitish prominent stomata, areoles densely spiny, spines radially arranged, 1–5 central spines ..................................................................................................................................................................................................5 - Stem-segments, pericarp and fruits without visible stomata, areoles scarcely spiny, spine perpendicular or inclined to stemsegments, only 1 central spine............................................................................................................................................................7 5. Stem-segments with podaria slightly raised, spines thin and up to 3.0 cm long, golden or yellowish, pericarp and fruits unarmed.. ............................................................................................................................................................................................................6 - Stem-segments without visible podaria, spines thick and up to 5.5 cm long, whitish tipped brownish, pericarp and young fruits spiny ..................................................................................................................................................................................... T. armata 6. Fruits with 20–30 seeds, pulp reddish ...................................................................................................................................... T. lilae - Fruits with 6–15 seeds, pulp translucent or greenish ..................................................................................................... T. palmadora 7. Stem-segments orbicular or obovate, young stem-segments areoles with long hairs ........................................................ T. saxatilis - Stem-segments oblong or subcylindric, young stem-segments areoles without hairs .......................................................................8 8. Stem-segments with thin acicular cylindric spines, fruits oblong......................................................................................................9 - Stem-segments with thick acicular cylindric spines, sometimes slightly flattened at base, fruits globose......................................10 9. Flowers with reflexed segments, fruits orangish with no color variation around areoles.............................................. T. × flammea - Flowers with erect segments, fruits whitish with a green ring surrounding the areoles ..................................................... T. werneri 10. Stem-segments oblong (9–15 × 6–8 cm ), spines erect................................................................................................... T. gladispina - Stem-segments subcylindric (3–8 × 1.5–3 cm ), spines contorted....................................................................................... T. × quipa 11. Plants creeping, stem-segments subcylindric, pericarpel areoles with reddish hairs................................................ T. subcylindrica - Plants decumbent, stem-segments flat, pericarpel areoles without hairs ........................................................................ T. inamoena