Abstract
The new species described here was collected during expeditions carried out in the Lago do Amapá Environmental Protection Area, located in Acre State, Brazil. Morphological analysis and comparisons with close species confirmed that the collected specimens are a new species for science. Passiflora acreana was placed in P. subg. Passiflora, sect. Granadillastrum Triana & Planch., and can be distinguished by the presence of foliaceous, reniform, awned stipules, 4–8 pedunculate petiolar glands, with apex concave, and corona with 10 series of filaments. Descriptions, illustrations, distribution map, and conservation status are presented.
References
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Bernacci, L.C., Nunes, T.S., Mezzonato, A.C., Milward-de-Azevedo, M.A., Imig, D.C. & Cervi, A.C. (2020) Passifloraceae in Flora e Funga do Brasil. Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB182 (accessed 15 Apr 2022).</span></span></span>
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Cervi, A.C. & Linsingen, L. von (2010) Passiflora kikiana, a new species of Passifloraceae from the Brazilian Amazon. Acta Botanica Brasilica 24: 1062–1064. https://doi.org/10.1590/S0102-33062010000400021</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">De Candolle, A.P. (1828) Passifloraceae. In: De Candolle, A.P. (ed.) Prodromus Systematis Naturalis Regni Vegetabilis. Treuttel & Würtz, Paris, pp. 321–338.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Feuillet, C. (2010) Folia taxonomica 18. The status of Passiflora citrifolia and a new species in subgenus Astrophea (Passifloraceae), Passiflora jussieui. Journal of the Botanical Research Institute of Texas 4: 609–614.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Feuillet, C. & MacDougal, J.M. (2003) A new infrageneric classification of Passiflora L. (Passifloraceae). Passiflora: The Journal & Newsletter of Passiflora Society International 13: 34–38. https://doi.org/10.2307/3393379</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Feuillet, C. & MacDougal, J.M. (2007) Passifloraceae. In: Kubitzki, K. (ed.) The families and genera of vascular plants. Springer-Verlag, Berlin, pp. 270–280. https://doi.org/10.1007/978-3-540-32219-1_35</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">IUCN—International Union for Conservation of Nature. (2022) Guidelines for using the IUCN redlist categories and criteria. Version 15. Prepared by the standards and petitions sub-committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 12 January 2023)</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Killip, E.P. (1938) The American Species of Passifloraceae. Publication Field Museum of Natural History - Botanical Series 19 (1–2): 1–613. https://doi.org/10.5962/bhl.title.2269</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Koch, A.N., Cardoso, A.L.R. & Ilkiu-Borges, A.L. (2014) Novelties in Passifloraceae from the Brazilian Amazon. Check List 10: 453–456. https://doi.org/10.15560/10.2.453</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Koch, A.N., Engels, M.E., Reis, N.N.V. & Soares-Lopes, C.R.A. (2019) A new subspecies and taxonomic notes on Passiflora L. (Passifloraceae) in Brazilian Amazon, Mato Grosso, Brazil. Phytotaxa 402: 13–20. https://doi.org/10.11646/phytotaxa.402.1.2</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kunth, K.S. (1822) Sur Le Genre Bambusa. In: Blainville, D. (ed.) Journal de Physique, de Chimie, d’Histoire Naturelle et des Arts 95: 1–400.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) Species Plantarum. Imprensis Laurentii Salvii, Stockholm, 1200 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Masters, M.T. (1871) Contributions to the Natural History of the Passifloraceae. Transactions of the Linnean Society of London 27: 593–645. https://doi.org/10.1111/j.1096-3642.1871.tb00221.x</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Masters, M.T. (1872) Passifloraceae. In: Martius, C.P.F., Eichler, A.G. & Urban, I. (Eds.) Flora Brasiliensis. Frid. Fleischer, Lipsiae, pp. 527–628.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Mendonça, C.B.F., Milward-de-Azevedo, M.A. & Gonçalves-Esteves, V. (2017) Distribution extensions for species of the Passiflora subgenus Astrophea (DC.) Masters from Brazil (Passifloraceae s.s.). Check List 13: 467–473. https://doi.org/10.15560/13.5.467</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C. (2018) Passiflora bernaccii (Passifloraceae s.s.), a new species from Acre, Brazil. Phytotaxa 372: 229–235. https://doi.org/10.11646/phytotaxa.372.2.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Milward-de-Azevedo, M.A., Mendonça, C.B.F. & Gonçalves-Esteves, V. (2018) Taxonomy, palynology and distribution notes of seven species of Passiflora L. (Passifloraceae s.s.) newly recorded from Brazil. Phytokeys 95: 1–14. https://doi.org/10.3897/phytokeys.95.22342</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Calazans, L.S.B. & Valadares, R.T. (2021a) Passiflora jorgeana, a New Species of Passiflora (Passifloraceae) from Bahia, Brazil. Novon 29: 1–8. https://doi.org/10.3417/2020630</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Ribeiro, R.S. & Gonella, P.M. (2021b) Maracujá on the rocks: a new Passiflora species (Passifloraceae sensu stricto) from the rupicolous ecosystems of the Brazilian Atlantic rainforest. Willdenowia 51: 371–381. https://doi.org/10.3372/wi.51.51305</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Silva, E.O. & Oliveira, E.A. (2021c) Passiflora bacabensis (Passifloraceae sensu stricto), a new species from Mato Grosso, central-west region of Brazil. Nordic Journal of Botany 39 (8)-e03279: 2 https://doi.org/10.1111/njb.03279</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Parteka, L.M., Mattos, L., Richardo, J. Fagundes, B.S. & Silvério, A. (2021) Passiflora coelestis, a new species of Passiflora section Dysosmia (Passifloraceae sensu stricto) from Southern Brazil. Phytotaxa 516: 140–158. https://doi.org/10.11646/phytotaxa.516.2.2</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Radford, A.E., Dickison, W.C., Massey, J.R. & Bell, C.R. (1974) Vascular Plant Systematics. New York, Harper & Row Publishers, 891 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B. (2022 [continuously updated]) Index herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/ih/ (accessed 15 Apr 2022).</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Triana, J.J. & Planchon, J.E. (1873) Passifloraceae. Annales des Sciences Naturelles Botanique 5: 121–186.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Umer, T. & MacDougal, J.M. (2004) Passiflora: Passionflowers of the World. Timber Press, Cambridge, 430 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Cervi, A.C. (1997) Passifloraceae do Brasil. Estudos do gênero Passiflora L., subgênero Passiflora. Fontqueria 45: 1–92.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Cervi, A.C. & Linsingen, L. von (2010) Passiflora kikiana, a new species of Passifloraceae from the Brazilian Amazon. Acta Botanica Brasilica 24: 1062–1064. https://doi.org/10.1590/S0102-33062010000400021</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">De Candolle, A.P. (1828) Passifloraceae. In: De Candolle, A.P. (ed.) Prodromus Systematis Naturalis Regni Vegetabilis. Treuttel & Würtz, Paris, pp. 321–338.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Feuillet, C. (2010) Folia taxonomica 18. The status of Passiflora citrifolia and a new species in subgenus Astrophea (Passifloraceae), Passiflora jussieui. Journal of the Botanical Research Institute of Texas 4: 609–614.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Feuillet, C. & MacDougal, J.M. (2003) A new infrageneric classification of Passiflora L. (Passifloraceae). Passiflora: The Journal & Newsletter of Passiflora Society International 13: 34–38. https://doi.org/10.2307/3393379</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Feuillet, C. & MacDougal, J.M. (2007) Passifloraceae. In: Kubitzki, K. (ed.) The families and genera of vascular plants. Springer-Verlag, Berlin, pp. 270–280. https://doi.org/10.1007/978-3-540-32219-1_35</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">IUCN—International Union for Conservation of Nature. (2022) Guidelines for using the IUCN redlist categories and criteria. Version 15. Prepared by the standards and petitions sub-committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 12 January 2023)</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Killip, E.P. (1938) The American Species of Passifloraceae. Publication Field Museum of Natural History - Botanical Series 19 (1–2): 1–613. https://doi.org/10.5962/bhl.title.2269</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Koch, A.N., Cardoso, A.L.R. & Ilkiu-Borges, A.L. (2014) Novelties in Passifloraceae from the Brazilian Amazon. Check List 10: 453–456. https://doi.org/10.15560/10.2.453</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Koch, A.N., Engels, M.E., Reis, N.N.V. & Soares-Lopes, C.R.A. (2019) A new subspecies and taxonomic notes on Passiflora L. (Passifloraceae) in Brazilian Amazon, Mato Grosso, Brazil. Phytotaxa 402: 13–20. https://doi.org/10.11646/phytotaxa.402.1.2</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Kunth, K.S. (1822) Sur Le Genre Bambusa. In: Blainville, D. (ed.) Journal de Physique, de Chimie, d’Histoire Naturelle et des Arts 95: 1–400.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) Species Plantarum. Imprensis Laurentii Salvii, Stockholm, 1200 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Masters, M.T. (1871) Contributions to the Natural History of the Passifloraceae. Transactions of the Linnean Society of London 27: 593–645. https://doi.org/10.1111/j.1096-3642.1871.tb00221.x</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Masters, M.T. (1872) Passifloraceae. In: Martius, C.P.F., Eichler, A.G. & Urban, I. (Eds.) Flora Brasiliensis. Frid. Fleischer, Lipsiae, pp. 527–628.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Mendonça, C.B.F., Milward-de-Azevedo, M.A. & Gonçalves-Esteves, V. (2017) Distribution extensions for species of the Passiflora subgenus Astrophea (DC.) Masters from Brazil (Passifloraceae s.s.). Check List 13: 467–473. https://doi.org/10.15560/13.5.467</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C. (2018) Passiflora bernaccii (Passifloraceae s.s.), a new species from Acre, Brazil. Phytotaxa 372: 229–235. https://doi.org/10.11646/phytotaxa.372.2.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Milward-de-Azevedo, M.A., Mendonça, C.B.F. & Gonçalves-Esteves, V. (2018) Taxonomy, palynology and distribution notes of seven species of Passiflora L. (Passifloraceae s.s.) newly recorded from Brazil. Phytokeys 95: 1–14. https://doi.org/10.3897/phytokeys.95.22342</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Calazans, L.S.B. & Valadares, R.T. (2021a) Passiflora jorgeana, a New Species of Passiflora (Passifloraceae) from Bahia, Brazil. Novon 29: 1–8. https://doi.org/10.3417/2020630</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Ribeiro, R.S. & Gonella, P.M. (2021b) Maracujá on the rocks: a new Passiflora species (Passifloraceae sensu stricto) from the rupicolous ecosystems of the Brazilian Atlantic rainforest. Willdenowia 51: 371–381. https://doi.org/10.3372/wi.51.51305</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Mezzonato-Pires, A.C., Silva, E.O. & Oliveira, E.A. (2021c) Passiflora bacabensis (Passifloraceae sensu stricto), a new species from Mato Grosso, central-west region of Brazil. Nordic Journal of Botany 39 (8)-e03279: 2 https://doi.org/10.1111/njb.03279</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Parteka, L.M., Mattos, L., Richardo, J. Fagundes, B.S. & Silvério, A. (2021) Passiflora coelestis, a new species of Passiflora section Dysosmia (Passifloraceae sensu stricto) from Southern Brazil. Phytotaxa 516: 140–158. https://doi.org/10.11646/phytotaxa.516.2.2</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Radford, A.E., Dickison, W.C., Massey, J.R. & Bell, C.R. (1974) Vascular Plant Systematics. New York, Harper & Row Publishers, 891 pp.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B. (2022 [continuously updated]) Index herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: http://sweetgum.nybg.org/ih/ (accessed 15 Apr 2022).</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Triana, J.J. & Planchon, J.E. (1873) Passifloraceae. Annales des Sciences Naturelles Botanique 5: 121–186.</span></span></span>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Umer, T. & MacDougal, J.M. (2004) Passiflora: Passionflowers of the World. Timber Press, Cambridge, 430 pp.</span></span></span>