Research Article |
Corresponding author: Leonardo Versieux ( lversieux@yahoo.com.br ) Academic editor: Ricarda Riina
© 2017 Leonardo Versieux, Nállarett Dávila, Geadelande Delgado, Valdeci Fontes, Edweslley Moura, Tarciso Filgueiras, Marccus Alves, Eric Carvalho, Daniel Piotto, Rafaela Forzza, Alice Calvente, Jomar G. Jardim.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Versieux LM, Dávila N, Delgado GC, de Sousa VF, de Moura EO, Filgueiras T, Alves MV, Carvalho E, Piotto D, Forzza RC, Calvente A, Jardim JG (2017) Integrative research identifies 71 new plant species records in the state of Rio Grande do Norte (Brazil) and enhances a small herbarium collection during a funding shortage. PhytoKeys 86: 43-74. https://doi.org/10.3897/phytokeys.86.13775
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A National Forest Inventory (NFI) encompassing the entire territory of Brazil is in progress. It is coordinated and promoted by the Brazilian Forest Service of the Ministry of Environment. In each state, the NFI collaborates with local herbaria by receiving collected plant material and performing species identification. Consultants are hired by the NFI and work at the local herbaria under the supervision of a curator. In exchange for curatorial assistance, the NFI provides equipment and consumables for the herbarium. Other public projects collaborating with NFI are Reflora and the Brazilian Biodiversity Information System (SiBBr). Both projects have online platforms that seek to connect herbaria and make all their data freely available, including high quality digital images of specimens. Through inter-institutional collaboration, the joint interests of NFI, Reflora, SiBBr and local herbaria have improved collections, expanded the online Reflora database, and provided the NFI with verified species lists. These strategic uses of public funding are positively affecting Botany, particularly during a period of economic crisis and cuts in research. Here, we illustrate the increase in floristic knowledge through the improvement of a herbarium collection in Rio Grande do Norte (RN) – the Brazilian state with the lowest levels of plant richness. We report 71 new occurrences of vascular plants for RN, belonging mainly to the Poaceae, Fabaceae and Malvaceae. Most of the species with new occurrences have a Neotropical distribution (21 spp.) and only seven are restricted to the Brazilian Northeast. Our findings highlight previous gaps in RN’s floristic knowledge. The partnership NFI, Reflora, SiBBr and the UFRN herbarium improved herbarium curation, digital collection, and quality of data. Finally, a fellowship provided by Reflora and SiBBr allowed improving curation by distributing duplicates and incorporating the Herbarium of Câmara Cascudo Museum.
Brazil Flora Group, Flora, floristics, Herbarium collection, Inventory, Reflora, SiBBr, IFN
A National Forest Inventory (NFI) covering all of Brazil is currently in progress. The NFI is a major undertaking by the Brazilian government, specifically, the Brazilian Forest Service, a public section of the Ministry of Environment, to periodically gather information about the forests and land cover of Brazil, through a systematic sampling of the territory using a 20 km × 20 km grid. In each state, the NFI invites local herbaria to receive and identify the collected specimens. Consultants are hired by the NFI and stay at the local herbarium under the supervision of a curator to identify plants to species. In exchange for this curatorial assistance, the NFI helps the herbarium by providing equipment and consumables. In Rio Grande do Norte (RN), the NFI started in 2014. Two additional public projects that are working with the NFI are Reflora and the Brazilian Biodiversity Information System (SiBBr). Reflora and the SiBBr are online platforms that connect herbaria, making data and high quality images of specimens in their collections freely available. The main goal of Reflora is to complete the Flora do Brasil 2020 online project, which relies on specimen data and images from herbaria in Brazil, the USA, and Europe. Inter-institutional collaboration serves the interests of NFI, Reflora, SiBBr and local herbaria, improving collections, expanding the Reflora database, and providing the NFI with accurate lists of plants. In this paper, we discuss the details and results of a four-part collaboration that makes strategic use of public funding to positively impact the study of Botany during tough economic times.
Rio Grande do Norte (RN) is a Brazilian state that consists of two phytogeographical domains: Dry Woodlands (Caatinga) and Atlantic Forest (Floresta Atlântica). The savanna (Cerrado) vegetation is scattered in small patches throughout the state. Different vegetation types occur within these phytogeographical domains: deciduous, semi-deciduous, subperennial and seasonal mixed palm forest (dominated by Copernicia prunifera (Mill.) H.E. Moore), dunes and coastal sand plain vegetation (restinga), xeric rocky outcrops, natural and anthropic fields, mangroves, saline desert and aquatic vegetation (
The Lista de Espécies da Flora do Brasil (
The most recent account listed 1,222 species of angiosperms in RN, only five of which are endemic to the state (
Although the UFRN herbarium is a small collection (~25,000 specimens), it is the most representative of RN’s flora. The objective of this paper is to describe the progress in the RN floristic knowledge after joint efforts dedicated to the NFI in RN. Together, IFN, SiBBr and Reflora projects have been addressing poor species coverage and lack of investments in botanical collections. Having completed this field inventory, we can show the new species records for the RN flora, and whether these species are restricted to the northeast of Brazil or else are widely-distributed species that have been previously overlooked in RN. Finally, we report how participation in this joint initiative has influenced and affected the infrastructural legacy of the UFRN herbarium.
The NFI fieldwork in RN was carried out from March to October 2014 by private environmental consultants, and specimens began to be deposited in the UFRN herbarium in December 2014. The sampling units of the NFI are distributed according to the National Sampling Points Grid (Grade Nacional de Pontos Amostrais – GNPA), established by the Brazilian Forest Service. The grid density is 20×20 km, covering all of Brazil (
A total of 556 voucher specimens were collected and analyzed to estimate the number of new occurrences for RN. All specimens collected were identified at the UFRN Herbarium using appropriate taxonomic literature and floras, comparisons with specimens identified by specialists, or direct determination by taxonomic specialists. We also incorporated the collection of the Câmara Cascudo Museum (MCC), which used to be an independent collection within UFRN. The MCC collection was partially revised by a technician provided by Reflora and SiBBr projects. All vouchers from the NFI were deposited at UFRN (including non-fertile material) and duplicates were sent to other herbaria (RB, HUEFS, UFP, SP, MG; acronyms follow Thiers continuously updated). Furthermore, during the project, the entire UFRN herbarium collection was digitalized into high quality images that are now available in Jabot platform http://ufrn.jbrj.gov.br.
We used Lista de Espécies da Flora do Brasil (http://floradobrasil.jbrj.gov.br), now updated to Flora do Brasil 2020, to determine whether species identified were new records for the state. Though Flora do Brasil 2020 should be continuously updated, we highlight new records in our list, in case that new occurrences reported in scientific literature have been missed.
To get a better picture of the flora of RN, we checked whether the new occurrences are taxa with broad or restricted ranges, as this information may indicate the degree to which they are absent from collections. We defined five categories of distribution according to geographical and political boundaries to infer whether new species records had a distribution restricted to the northeast of Brazil or else they are more widely distributed: 1. Pantropical (“Cosmopolite”): occurring in many places even outside of the tropics, 2. American: occurring all over the Americas, 3. Neotropical: occurring in the Neotropical region, 4. Brazilian: occurring in many states of Brazil – not exclusive to the Northeast region, 5. Northeast: occurring in the Northeast region of Brazil. In addition, we provide comments about each new recorded taxon, including the phytogeographical domains and municipalities where it occurs in RN. Maps were created in QGIS 2.14 (
The Brazilian states are abbreviated as follows: AC: Acre, AL: Alagoas, AP: Amapá, AM: Amazonas, BA: Bahia, CE: Ceará, DF: Distrito Federal, ES: Espírito Santo, GO: Goiás, MA: Maranhão, MT: Mato Grosso, MS: Mato Grosso do Sul, MG: Minas Gerais, PA: Pará, PB: Paraíba, PR: Paraná, PE: Pernambuco, PI: Piauí, RJ: Rio de Janeiro, RN: Rio Grande do Norte, RS: Rio Grande do Sul, RO: Rondônia, RR: Roraima, SC: Santa Catarina, SP: São Paulo, SE: Sergipe, TO: Tocantins.
The NFI sampled 133 conglomerates in RN, including 127 in Caatinga and six in Atlantic Rainforest (Figure
We found 71 newly-occurring species (Table
Considering the curatorial improvement of the UFRN collection we highlight the merging of the Museu Câmara Cascudo into UFRN herbarium. The specimens from the Museu Câmara Cascudo included 405 angiosperms (54 families), and 1,224 macroalgae (31 families). Algae were not studied in this work, but we indicate the new occurrences among angiosperms (Table
List of new floristic records of the National Forest Inventory from Rio Grande do Norte state, Brazil. *Sterile specimen **Species previously cited in the literature but not in Flora do Brasil 2020.
Family | Species | Voucher | Municipality | Distribution |
---|---|---|---|---|
Amaranthaceae | Froelichia humboldtiana (Roem. & Schult.) Seub. | Silva, A.F. 43; Moura, E.O. 125 | Serra do Mel; Timbaúba dos Batistas | Neotropical |
Anacardiaceae | Spondias purpurea L. | Gonçalves, F.B. 447* | Ceará-Mirim | Neotropical |
Asteraceae | Stilpnopappus laiseae R.Barros & R.Esteves | Silva, A.F. 54 | Serra Negra do Norte | Northeast |
Burseraceae | Protium heptaphyllum (Aubl.) Marchand | Gonçalves, F.B. 405; Dantas, A. 191 | Canguaretama; Touros | Neotropical |
Cactaceae | Melocactus ernestii Vaupel | Souza, A.C.D. 13 | Serra de São Bento | Brazilian |
Celastraceae | Maytenus acanthophylla Reissek | Jardim, J.G. 6393 | Serra de São Bento | Brazilian |
Chrysobalanaceae | **Hirtella ciliata Mart. & Zucc. | Gonçalves, F.B. 417; 418; 441; MCC | Touros; Pureza | Neotropical |
Chrysobalanaceae | **Hirtella racemosa Lam. | Santos, L.A.S. 1268 | Ceará-Mirim | Neotropical |
Cyperaceae | Becquerelia cymosa Brongn. | Roque, A.A. 1375 | Canguaretama | Neotropical |
Cyperaceae | Eleocharis flavescens (Poir.) Urb. | Jardim, J.G. 5823 | Extremoz | American |
Cyperaceae | Eleocharis maculosa (Vahl) Roem. & Schult. | Jardim, J.G. 5624 | Extremoz | American |
Cyperaceae | Eleocharis montana (Kunth) Roem. & Schult. | Oliveira, A.C.P. 1357; Roque, A.A. 929 | Ceará-Mirim; São João do Sabugi | American |
Cyperaceae | Rhynchospora caracasana (Kunth) Boeckeler | Moura, E.O. 149; Ribeiro, A.R.O. 48 | Caraúbas; Canguaretama | Neotropical |
Cyperaceae | Rhynchospora gigantea Link | Jardim, J.G. 6756 | Canguaretama | American |
Cyperaceae | Scleria macrophylla J.Presl & C.Presl | Jardim, J.G. 6757 | Canguaretama | American |
Euphorbiaceae | Bernardia sidoides (Klotzsch) Müll. Arg. | Dantas, R. 63; Silva, A.F. 20 | Currais Novos; Açu | Neotropical |
Euphorbiaceae | Croton campestris A.St.-Hil. | Gonçalves, F.B. 423 | Parazinho | Neotropical |
Euphorbiaceae | Ditaxis malpighiacea (Ule) Pax & K.Hoffm. | Gonçalves, F.B. 371 | Macaíba | Brazilian |
Euphorbiaceae | Manihot esculenta Crantz | Gonçalves, F.B. 349 | Serra Caiada | Pantropical |
Fabaceae | **Amburana cearensis (Allemão) A.C.Sm. | Gonçalves, F.B. 465*; Silva, A.F. 30*; Dantas, R. 78* | Campo Redondo; Upanema; Venha Ver | Neotropical |
Fabaceae | **Ancistrotropis peduncularis (Kunth) A.Delgado | Silva, A.F. 60 | Florânia | Neotropical |
Fabaceae | Bauhinia dubia G.Don | Moura, E.O. 218 | Areia branca | Brazilian |
Fabaceae | **Dioclea violacea Mart. ex Benth | Borges, S. 257 | Natal | American |
Fabaceae | Calliandra depauperata Benth. | Dantas, R. 3; 103* | Macau; Mossoró | Brazilian |
Fabaceae | Calliandra sessilis Benth. | Dantas, R. 102* | Macau | Brazilian |
Fabaceae | Inga cf. vera Willd. | Dantas, R. 47A* | Jardim de Piranhas | Neotropical |
Fabaceae | **Mimosa invisa Mart. ex Colla | Silva, A.F. 100 | Riacho de Santana | Neotropical |
Fabaceae | **Parkinsonia aculeata L. | Silva, A.F. 91; Dantas, R. 61; Santos, L.A.S 1246 | Pilões; São José do Seridó; Santo Antônio | Pantropical |
Fabaceae | **Poincianella bracteosa (Tul.) L.P.Queiroz | Silva, A.F. 5; Dantas, A. 295 | Mossoró; Touros | Neotropical |
Fabaceae | **Poincianella pyramidalis (Tul.) L.P.Queiroz | Dantas, R. 27; Silva, R.E 7 | Governador Dix-Sept Rosado; Caraúbas | Brazilian |
Fabaceae | **Stylosanthes humilis Kunth | Dantas, R. 66; Silva, A.F. 93 | Currais Novos; Marcelino Vieira | Neotropical |
Fabaceae | **Trischidium molle (Benth.) H.E.Ireland | Dantas, R. 33*; Gonçalves, F.B. 431; Santos, L.A.S. 1267 | Carnaubais; Ceará-Mirim; Pureza | Brazilian |
Lecythidaceae | Eschweilera ovata (Cambess.) Mart. ex Miers | Dantas, A. 241 | Canguaretama | Brazilian |
Malvaceae | Ayenia erecta Mart. ex K.Schum. | Moura, E.O. 133 | Severiano Melo | northeast |
Malvaceae | Ceiba glaziovii (Kuntze) K.Schum. | Santos, L.A.S. 1229 | Santa Cruz | northeast |
Malvaceae | Helicteres cf. guazumifolia Kunth | Gonçalves, F.B. 382* | Macaíba | Neotropical |
Malvaceae | Herissantia crispa (L.) Brizicky | Dantas, R. 39; Silva, A.F. 1002; Silva R.E. 10 | Carnaubais; Santa Cruz; Porto do Mangue | American |
Malvaceae | Malachra fasciata Jacq. | Dantas, A. 215 | Tibau do Sul | American |
Malvaceae | Melochia tomentosa L. | Santos, L.A.S. 1226 | Santa Cruz | American |
Malvaceae | Pavonia cancellata (L.) Cav. | Silva, A.F. 52; Gonçalves 394 | Serra Negra do Norte; Lagoa Salgada | American |
Malvaceae | **Pseudobombax marginatum (A.St.-Hil., Juss. & Cambess.) A. Robyns | Silva, A.F. 99* | Riacho de Santana | Neotropical |
Malvaceae | Sida acuta Burm.f. | Gonçalves, F.B. 360 | Goianinha | Pantropical |
Malvaceae | Sida ciliaris L. | Gonçalves, F. B. 397; 490 | Lagoa Salgada; Santa Maria | Pantropical |
Malvaceae | Sidastrum paniculatum (L.) Fryxell | Santos, L.A.S. 1249; Dantas, A. 162 | Santo Antônio; Tibau do Sul | Neotropical |
Malvaceae | Waltheria brachypetala Turcz. | Dantas, A. 298 | São Bento do Norte | northeast |
Malvaceae | Wissadula hernandioides (L’Hér.) Garcke | Santos, L.A.S. 1240 | São José do Campestre | American |
Melastomataceae | Clidemia hirta (L.) D.Don | Moura, E.O. 21 | Macaíba | Neotropical |
Melastomataceae | Tibouchina gardneri (Naudin) Cogn. | Jardim, J.G. 6295 | Serra de São Bento | northeast |
Myrtaceae | Eugenia astringens Cambess. | Dantas, A. 110 | Nísia Floresta | Brazilian |
Nyctaginaceae | Guapira campestris (Netto) Lundell | Roque, A.A. 1103 | São José de Mipibu | Brazilian |
Nyctaginaceae | Guapira cf. noxia (Netto) Lundell | Silva, R.E. 05*; Gonçalves, F.B. 497* | João Câmara; Porto do Mangue | Brazilian |
Phyllanthaceae | Savia sessiliflora (Sw.) Willd. | Gonçalves, F.B. 362* | Macaíba | American |
Poaceae | Andropogon fastigiatus Sw. | Oliveira, R.C. 1743 | Canguaretama | Pantropical |
Poaceae | Aristida ekmaniana Henrard | Flor, R. 268 | Ceará-Mirim | Brazilian |
Poaceae | Aristida recurvata Kunth | Oliveira, A.C.P. sn | Rio do fogo | American |
Poaceae | Cenchrus echinatus L. | Dantas, A. 189 | Baía Formosa | Pantropical |
Poaceae | Chrysopogon zizanioides (L.) Roberty | Cestaro, L.A. 97-0014 | Natal | American |
Poaceae | Digitaria ciliaris (Retz.) Koeler | Dantas, R.A. 70 | Encanto | Pantropical |
Poaceae | Digitaria horizontalis Willd. | Dantas, A. 190 | Baía Formosa | American |
Poaceae | Gymnopogon fastigiatus Nees | Souza, E.B. 3520; Silva, A.F. 57 | Apodi; Serra Negra do Norte | American |
Poaceae | Hyparrhenia diplandra (Hack.) Stapf | Jardim, J.G. 5788 | Jucurutu | Pantropical |
Poaceae | Lasiacisdivaricata var. austroAmericana Davidse | Dantas, A. 116 | Nísia Floresta | American |
Poaceae | Piresia leptophylla Soderstr. | Jardim, J.G. 6251 | Baía Formosa | American |
Poaceae | Schizachyrium condensatum (Kunth) Nees | Dantas, A. 231; Flor, R. 266; 267 | Ceará-Mirim; Tibau do Sul | American |
Poaceae | Setaria viridis (L.) P.Beauv. | Santos, L.A.S. 1271 | João Câmara | Pantropical |
Poaceae | Sorghumbicolor var. arundinaceum (Desv.) de Wet & J.R.Harlan ex Davidse | Oliveira, R.C. 2236; 2164 | Riacho de Santana; Luís Gomes | Pantropical |
Pteridaceae | **Adiantum deflectens Mart. | Moura, E.O. 146 | São Francisco do Oeste | Neotropical |
Rubiaceae | Mitracarpus baturitensis Sucre | Moura, E.O. 138; 212; 213 | Carnaubais; Parelhas | Brazilian |
Rubiaceae | Mitracarpus longicalyx E.B.Souza & M.F.Sales | Silva, A.F. 119A | Rio do fogo | northeast |
Sapindaceae | Allophylus quercifolius (Mart.) Radlk. | Santos, L.A.S. 1232 | São Tomé | northeast |
Selaginellaceae | **Selaginella convoluta (Arn.) Spring | Silva, A.F. 68 | Cruzeta | Neotropical |
Distribution patterns of species treated here as new botanical records for Rio Grande do Norte state, Brazil.
Distribution pattern | Number of species |
---|---|
Neotropical | 21 |
American | 19 |
Brazilian | 14 |
Pantropical | 10 |
Northeast Brazil | 7 |
AMARANTHACEAE
Froelichia humboldtiana (Roem. & Schult.) Seub.
This species occurs in Brazil and Venezuela (
ANACARDIACEAE
Spondias purpurea L.
This species is widely distributed from North and Central America to Brazil, occurring in dry or semi-deciduous forests (Mitchell and
ASTERACEAE
Stilpnopappus laiseae R.Barros & R.Esteves
This species is only known from PI state in Brazil occurring in Caatinga areas (
BURSERACEAE
Protium heptaphyllum (Aubl.) Marchand
This species has a Neotropical distribution (
CACTACEAE
Melocactus ernestii Vaupel
Endemic to Brazil, it is distributed in AL, BA, MG, PB, PE, and SE states and in Caatinga and Atlantic Rainforest (
CELASTRACEAE
Maytenus acanthophylla Reissek
This species is endemic to Brazil, where it occurs in BA and MG states where it grows in Caatinga (
CYPERACEAE
Becquerelia cymosa Brongn.
This species occurs from Nicaragua and Costa Rica in Central America, Trinidad and Tobago and the Guianas to Brazil in South America (
Eleocharis flavescens (Poir.) Urb.
This species is distributed in the United States, Mexico, Central America, Antilles, and South America (
Eleocharis maculosa (Vahl) Roem. & Schult.
This species is widely distributed in the Americas from Central America to South America (
Eleocharis montana (Kunth) Roem. & Schult.
This species is distributed from United States to South America including Antilles (
Rhynchospora caracasana (Kunth) Boeckeler
This species is distributed in Brazil, Bolivia, Suriname, Guyana and Venezuela (
Rhynchospora gigantea Link
This species is distributed from Mexico, Central America to Brazil in South America (
Scleria macrophylla J.Presl & C.Presl
This species is distributed from Mexico to Brazil including Antilles (
EUPHORBIACEAE
Bernardia sidoides (Klotzsch) Müll. Arg.
This species is widely distributed from North America to Brazil (
Croton campestris A. St.-Hil.
This species occurs in Bolivia and Brazil (
Ditaxis malpighiacea (Ule) Pax. & K. Hoffm.
This species is endemic to Brazil and it is only recorded for Al, BA, PI, PE, and PB states, in Caatinga domain (
Manihot esculenta Crantz
Native of South America and originated in the Amazon but widely distributed as a cultivated plant (Olsen and Schaal 1999). It has been previously recorded in Brazil for AC, AL, AM, AP, BA, CE, DF, GO, MA, MT, MG, PA, PE, PI, RO, and SP state, in Amazon Rainforest and Caatinga (
FABACEAE
Bauhinia dubia G. Don
Species endemic to Brazil where it is found in AM, CE, MA, PA, PI, and TO states, in Amazon Rainforest and Central Brazilian Savanna (
Calliandra depauperata Benth.
Endemic to Brazil and previously recorded in BA, CE, PE, and PI states, in Caatinga (
Calliandra sessilis Benth.
This species occurs only in Brazil. It has been reviously recorded in BA, CE, MA, MT, MG, PA, PE, and PI states (
Inga vera Willd.
Inga vera is widely distributed from Mexico to Argentina (
LECYTHIDACEAE
Eschweilera ovata (Cambress.) Mart. ex Miers
This species is known from Brazil in AL, AP, BA, ES, MA, MG, MT, PA, PR, PE, and SE state and Amazon and Atlantic Rainforest domains (
MALVACEAE
Ayenia erecta Mart. ex K.Schum.
This species is endemic to Brazil and recorded only in PI state in Caatinga domain (
Ceiba glaziovii (Kuntze) K.Schum.
This species is endemic to Brazil (
Helicteres guazumifolia Kunth
Helicteres guazumifolia occurs from Mexico to Brazil, in the states of BA, MT, PE, PI, RO, and SE (
Herissantia crispa (L.) Brizicky
This species is recorded from United State to Argentina (
Malachra fasciata Jacq.
This species occurs from Mexico to Bolivia in South America (
Melochia tomentosa L.
This species is distributed from United States to Paraguay (
Pavonia cancellata (L.) Cav.
It is distributed from Mexico to Brazil (
Pseudobombax marginatum (A.St.-Hill.) A. Robyns
It occurs in South America (
Sida acuta Burm. f
It has a Pantropical distribution (
Sida ciliaris L.
This species has a Pantropical distribution (
Sidastrum paniculatum (L.) Fryxell
Widely distributed in the Neotropics (
Waltheria brachypetala Turcz.
This species is endemic to Brazil where it occurs in BA, CE, PE, and PI states in Caatinga (
Wissadula hernandioides (L. Hér.) Garcke
Widely distributed from United States, Mexico, West Indies, Venezuela, Colombia, Bolivia, Paraguay, Argentina, and Brazil (
MELASTOMATACEAE
Clidemia hirta (L.) D. Don
This species is widely distributed from Mexico to Brazil (
Tibouchina gardneri (Naudin) Cogn.
This species is endemic to Brazil, where it occurs in CE and PE states and in Caatinga and Central Brazilian Savanna (
MYRTACEAE
Eugenia astringens Cambess.
This species is endemic to Brazil, it occurs in BA, ES, PR, RJ, SC, and SP states in Atlantic forest (
NYCTAGINACEAE
Guapira campestris (Netto) Lundell
This species is known only from Brazil in BA, DF, GO, MG, and PI states, growing in Central Brazilian Savanna (
Guapira noxia (Netto) Lundell
Guapira noxia is endemic to Brazil, where it occurs in DF, GO, MG, MS, MT and SP state in Campo Rupestre and Central Brazilian Savanna (
PHYLLANTACEAE
Savia sessiliflora (Sw.) Willd.
This species occurs from Mexico, Cuba, Puerto Rico, Hispaniola, Caribbean, Venezuela and Brazil (
POACEAE
Andropogon fastigiatus Sw.
This species occurs from Mexico, Central America, Antilles to South America and the Old World (
Aristida ekmaniana Henrard
Species endemic to Brazil where it occurs in BA, DF, GO, MG, PR, and SP states in Central Brazilian Savanna (
Aristida recurvata Kunth
American species distributed from Belize, Venezuela, Guayanas, Bolivia to Brazil (
Cenchrus echinatus L.
Pantropical species (
Chrysopogon zizanioides (L.) Roberty
This species occurs from United States to Argentina (
Digitaria ciliaris (Retz.) Koeler
This species occurs from United States to Argentina and in the Old World (
Digitaria horizontalis Willd.
Distributed from United States, Central America to Argentina (Vega and Rúgolo de Agrasar 2003). In Brazil, it occurs in AC, AL, AM, AP, BA, CE, GO, MA, MS, PA, PE, PB, PR, RJ, SC, SP, and TO states in Amazon Rainforest, Caatinga, Central Brazilian Savanna, Atlantic Rainforest and Pantanal (
Gymnopogon fastigiatus Nees
This species occurs from Central America to Bolivia (
Hyparrhenia diplandra (Hack.) Stapf
This species is worldwide distributed. In Brazil, it is only known from PE state Atlantic Rainforest (
Lasiacis divaricata var. austroamericana Davidse
This variety occurs in South America from Ecuador to Argentina (
Piresia leptophylla Soderstr.
This species is distributed from Colombia, Ecuador to Brazil (
Setaria viridis (L.) P.Beauv.
This species is widely distributed in the new and old world (
Schizachyrium condensatum (Kunth) Nees
This species occurs from Mexico, Central American, Caribbean to Argentina in South America (
Sorghum bicolor var. arundinaceum (Desv.) de Wet & J.R. Harlan ex Davidse
This is a cultivated and naturalized species originally from Africa that now is worldwide distributed (
RUBIACEAE
Mitracarpus baturitensis Sucre
This species is endemic to Brazil (
Mitracarpus longicalyx E.B.Souza & M.F.Sales
This species is endemic to Brazil, where it occurs in BA, CE, PE, and PI states, restricted to Caatinga domain (
SAPINDACEAE
Allophylus quercifolius (Mart.) Radlk.
This species is restricted to northeast of Brazil. It occurs in AL, BA, CE, PE, and SE states in Caatinga and Central Brazilian Savanna phytogeographical domains (
Systematic sampling in the entire state of RN during the NFI covered many municipalities that have seen little or no floristic attention in the past. Before the recent surveys, three municipalities – Natal, Mossoró and Serra Negra do Norte – had the highest botanical collecting effort for RN and 129 municipalities had less than 189 records (including 21 without any collection effort whatsoever) (
Most new occurrences belong to Poaceae, Fabaceae and Malvaceae. Fabaceae and Poaceae are the most species-rich families reported for the Caatinga (
Our sampling efforts improved occurrence data of widely-distributed species in Brazil. Some species were originally absent only in RN state, such as Clidemia hirta (Melastomataceae), while others were unknown in several other northeastern Brazilian states, such as Inga vera (Fabaceae) (also unknown in Alagoas and Sergipe) and Amburana cearensis (Fabaceae), which is categorized as endangered (
Only seven out of 71 newly-occurring species (~10%) have a distribution that is restricted to northeastern Brazil. These low numbers of endemic species are a general pattern for northeast Brazil flora compared to other regions. According to
The results of this NFI indicate that the number of species for RN is still underestimated. However, the knowledge of RN’s flora is growing rapidly. New species have recently been discovered (
We emphasize the importance of collaboration among institutions to improve herbarium collections. Most Brazilian herbaria can be considered small, having less than 20,000 records (
The partnership between NFI, Reflora, SiBBr and UFRN Herbarium has advanced knowledge of biodiversity by exploring areas with few botanical records and adding new species records for the Flora of Rio Grande do Norte. The geographical distribution of newly-added species is mostly Neotropical (21 spp.), while fewer (seven spp.) are endemic to northeastern Brazil. From these results, we conclude that species that have not been recorded to date may occur in different habitats, and that the entire state requires additional floristic inventories. Furthermore, we revealed areas that were poorly covered by existing botanical collections. We also recorded new species from areas with relatively high previous effort of collection, indicating that the species richness in RN remains underestimated. Even our collections may contain specimens that should be further analyzed and studied by specialists, who rarely have opportunities to visit small herbaria. Future botanical projects should fill these remaining gaps in collections, particularly focusing on seasonality. Finally, the NFI/Reflora/SiBBr projects in RN improved the UFRN herbarium collection by digitizing all specimens and improved the curation of the collection through exchange of material among institutions, increased visibility of our specimens online, and attention from specialists.
We thank Serviço Florestal Brasileiro (especially Dr. J. V. Freitas and G. Stancioli Pinho) and consultants involved in fieldwork, sampling and processing material during the NFI in Rio Grande do Norte. Reflora, SiBBr, and NFI enabled the entire UFRN herbarium digitization through donation of a digital camera and computers. J. Lombardi, L. Biral, R. Goldenberg, F. Mayer, B. Amorim, A. Roque, L. Rocha, E. Córdula provided taxonomic support. I. Alves, M. Alves, A. Fontes, E. Nascimento mounted, digitalized, and organized vouchers. Jason R. Straka assisted with editing of this manuscript. UFRN intern M. Alves has an undergraduate fellowship from Procad Capes (#88881.068513/2014-01). LMV and RCF have productivity fellowships from CNPq. Lastly, we thank the directors of Museu Câmara Cascudo, UFRN, for allowing the UFRN herbarium to house their collection and reviewers and editor Ricarda Riina for their comments.