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  1. Family: Polygalaceae Hoffmanns. & Link
    1. Genus: Polygala Tourn. ex L.
      1. Polygala minarum J.F.B.Pastore

        This species is accepted, and its native range is Brazil (Minas Gerais).

    [KBu]

    Pastore, J. F. B. 2016. Polygala minarum (Polygalaceae), a new species endemic to southern Minas Gerais, Brazil. Kew Bulletin 71: 42. DOI 10.1007/S12225-016-9658-1

    Type
    Type: Brazil, Minas Gerais, Carrancas, Estrada para a Serra das Bicas, c. 5 km saindo da cidadeaoladoesquerdo da estradaafloramentorupestre, 22 Feb. 2015, Pastore 5084 (holotype CTBS!; isotypes CEN!, HUEFS!, K!, NY!, RB!).
    Habit
    Subshrub erect and branched from the base to 30 cm tall, with fleshy roots, lignose stems to 1 – 1.5 mm diam., strongly angular, densely puberulous, trichomes short-clavate, stems green without yellowish glands forming spots. Leaves all alternate, subsessile, rigid-chartaceous, secondary veins prominent; lamina 0.6 – 1.2 × 0.3 – 0.5 cm, lanceolate, apex acuminate, margin revolute and base acute, densely covered by small glandular trichomes
    Inflorescences
    Racemes spiciform, 2.5 – 5 × 1 – 1.1 cm, reaching 7 cm after fruits have fallen, flowers congested; bracts 0.8 – 0.9 × 0.2 mm, lanceolate, apex acute, not ciliate, without yellowish spots, deciduous before the flowers open, c. 3 times longer than the bracteoles; bracteoles ovate, not ciliate; pedicel c. 0.9 mm, glabrous
    Flowers
    Flowers lilac-coloured, 6 – 6.2 mm long; outer sepals not ciliate, with whitish spots; lower outer sepals 1.8 – 1.9 × 0.8 mm, ovate, with acute apex; upper outer sepals 2.6 × 1.5 mm, ovate, with apex obtuse, free from each other almost to the base; inner sepals (wings) 4.2 × 2.6 mm, obovate, with apex obtuse, margins not ciliate, about twice the length of mature fruits; lateral petals 3.6 × 2 mm; keel c. 4 mm long, cristate, with whitish spots around the dorsal central vein, caducous on mature fruits; crest 10 – 12-lobed; style arched, terminated by an oblique cymbiform pre-stigmatic cavity, posterior extremity with a conspicuously crested appendage with abundant trichomes and an anterior globose stigma
    Fruits
    Capsules 3 – 3.1 × 3 mm, ovate, with whitish spots, style caducous in fruit; seeds c. 2.2 × 1.1 mm, ovoid, pubescent; appendages almost the same length as the seed, c. 2.1 mm
    Distribution
    Brazil, southern portion of the State of Minas Gerais, Lavras, Carrancas and São Sebastião do Paraíso. Map 1.
    Ecology
    Polygala minarum occurs in rocky field areas, called campo limporupestre, in red clay soil; altitudes between c. 880 – 1100 m.
    Conservation
    Polygala minarum occurs close to areas with occurrence of ferruginous laterite which is of economic interest for iron and other material exploration. Therefore, the conservation status fits within the criteria VU (B1: a, b3) of IUCN (2012); the known area of occupancy is estimated to be less than 2,000 km2 and, because its habitat is of strong economic interest for mining activity, a continued decline of habitat quality and quantity is anticipated.
    Note
    Polygala minarum is a reference to the state of Minas Gerais. Polygala minarum has fleshy roots and occurs in an area of rocky field (campo rupestre) where vegetation is not dense (low amount of organic material available), and most populations were found on the border of streams. Therefore, this species seems not to be adapted to the intense fire region of savanna. P. minarum flowers September, October, December, February and April. This system of flowering throughout much of the year (during the dry and rainy seasons in savannas of Central Brazil) is also shared by other related species, P. fontellana, P. nudicaulis, and P. poaya. The crested keel places Polygala minarum within Polygala subgenus Polygala, whereas the angular stems and whitish spots on floral parts is associated with the species P. poaya Mart. (from series Densifolium Marques), P. nudicaulis A. W. Benn. (type of series NudicaulesChodat included in series Tenues Chodat (1893) by Marques 1988), and P. fontellana Marques & A. C. A. Aguiar (described without series). Almost certainly, these species are related each other and the current series delimitation in Polygala doesn’t represent a phylogenetic perspective. Polygala minarum is morphologically closest to P. poaya. However, it is readily recognised by its lanceolate leaves 0.6 – 1.2 × 0.3 – 0.5 cm, and flower size 6 – 6.2 mm (vs elliptic leaves 2.5 – 4 × 0.9 – 1.6 cm, flowers 7 – 8 mm in P. poaya). P. minarum also can be recognised by its phenology not being tied to a response to fire, as occurs in P. poaya (see Table 1).

    Distribution

    Native to:

    Brazil Southeast

    Other Data

    Polygala minarum J.F.B.Pastore appears in other Kew resources:

    Bibliography

    First published in Kew Bull. 71(3)-42: 1 (2016)

    Literature

    Kew Bulletin

    • Pastore, J. F. B., Lüdtke, R, Ferreira, D. M. C. & Kuntz, J. (2015). Polygalaceae. In: Lista de Espécies da Flora do Brasil. Jardim Botânico do Rio de Janeiro. (http://floradobrasil.jbrj.gov.br/jabot/floradobrasil/FB195).
    • Pastore, J. F. B., Negrão, R., Fernandez, E. & Novaes, L. (2014). Polygalaceae. In: G. Martinelli, T. Messina & L. Santos Filho (orgs), Livrovermelho da flora doBrasil — PlantasRaras do Cerrado. 1 ed. Pp. 227 – 233. Andrea Jakobsson, CNC Flora, Rio de Janeiro.Google Scholar
    • Pastore, J. F. B. & Moraes, P. (2013). Generic Status and Lectotypifications for Gymnospora (Polygalaceae). Novon 22: 304 – 306.Google Scholar
    • IUCN. (2012). IUCN Red List Categories and Criteria, Version 3.1, 2 ed. IUCN, Gland & Switzerland.Google Scholar
    • Pastore, J. F. B. (2012). Caamembeca: Generic status and new name for Polygala subgenus Ligustrina (Polygalaceae). Kew Bull. 67: 435 – 442.CrossRefGoogle Scholar
    • Pastore, J. F. B. & Abbott, J. R. (2012). Taxonomic notes and new combinations for Asemeia (Polygalaceae). Kew Bull. 67: 1 – 22.Google Scholar
    • Abbott, J. R. (2011). Notes on the disintegration of Polygala (Polygalaceae), with four new genera for the Flora of North America. J. Bot. Res. Inst. Texas 5(1): 125 – 137.Google Scholar
    • Pastore, J. F. B., Cardoso, D. B. O. S. & Aymard, G. A. C. (2010). Synopsis, new combinations, and synonyms in Acanthocladus (Polygalaceae). Novon 20: 317 – 324.Google Scholar
    • Pastore, J. F. B. & Marques, M. C. M. (2009). Duasnovasespécies de Polygala (Polygalaceae) da região da Chapada dos Veadeiros, GO, Brasil. Acta Bot. Brasil. 23: 446 – 450.Google Scholar
    • Marques, M. C. M. (1988). Polígalas do Brasil V, seção Polygala (Polygalaceae). Arq. Jard. Bot. Rio de Janeiro 29: 1 – 114.Google Scholar
    • Chodat, R. H. (1893). Monographiapolygalacearum. Mém. Soc. Phys. Genève 31: 1 – 500.Google Scholar

    Kew Backbone Distributions

    • Forzza, R.C., Zappi, D. & Souza, V.C. (2016-continuously updated). Flora do Brasil 2020 em construção http://reflora.jbrj.gov.br/reflora/listaBrasil/ConsultaPublicaUC/ResultadoDaConsultaNovaConsulta.do.

    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0