Pachyrhizus erosus (L.) Urb.
  • Yam Bean Jicama


Cite taxon page as 'WFO (2020): Pachyrhizus erosus (L.) Urb. Published on the Internet;http://www.worldfloraonline.org/taxon/wfo-0000183119. Accessed on: 06 Jul 2020'

General Information

Vines, robust, twining. Root tubers 10-20 cm in diam. Leaflets rhombic or ovate, 4-18 × 4-20 cm, upper margin often somewhat dentate or lobed, lateral ones very oblique, sparsely pubescent abaxially. Racemes axillary, 15-30 cm; flowers 3-5 at thickened nodes. Calyx campanulate, 9-11 mm, adpressed pilose. Corolla purplish or pink; standard suborbicular, 15-20 mm, with yellow-green spot and 2 thickenings near base; wings falcate, auriculate; keel subfalcate, 15-20 mm. Ovary yellowish hirsute; style curved. Legumes 7.5-13 × 1.2-1.5 cm, com­pressed, hirsute. Seeds 8-10, subsquare. Fl. Aug, fr. Nov.

  • Provided by: [F].Flora Of CHina @ efloras.org
    • Source: [
    • 2
    • ]. 

    Pachyrhizus erosus (L.) Urb., Symb. Antill. 4: 311. 1905; Dolichos erosus L.; D. palmatilobus Sessé & Moç. ex DC.; P. erosus var. palmatilobus (Sessé & Moç. ex DC.) R.T. Clausen.

    Folíolos terminales frecuentemente 3–7-lobados, rómbicos, deltoides a ovado-reniformes, 10 cm de largo y ca 11 cm de ancho, ápice agudo, obtuso o redondeado, margen superior frecuentemente con 7–numerosos dientes ampliamente espaciados. Inflorescencias 21–43 cm de largo, floreciendo en ca la 1/2–1/3 de la longitud, nudos inconspicuos o alargados, mayormente con 4–11 flores, flores ca 2 cm de largo, mayormente azules o a veces lilas o violetas; cáliz 8–12 mm de largo. Legumbres 8–12 cm de largo y ca 1.2 cm de ancho, estrigosas, glabrescentes; semillas 6–11, 5.5–8 mm de largo y 5–7.5 mm de ancho, cafés.

    Común a ocasional, márgenes de bosques secos, campos abiertos y matorrales, en todo el país; 50–1000 m; fl y fr ago–dic; Moreno 3978, Stevens 4775; pantropical, cultivado por su raíz comestible. Sørensen reporta flores (11.3–) 15–25 mm de largo, alas y quilla glabros. El considera los taxones infraespecíficos de Clausen indefensibles debido a la variación inconsistente en la morfología de los folíolos. El folíolo terminal en Nicaragua puede ser no lobado o inconspicuamente lobado y el margen apical puede ser casi entero (Moreno 3978, 5779) o con 7–numerosos dientes bien espaciados, correspondiente a la variedad típica de Clausen (var. erosus); también el folíolo terminal puede ser palmadamente 3–7-lobado con senos profundos y redondeados (Moreno 5344, Stevens 4775), correspondiente a la var. palmatilobus de Clausen. "Jícama".

  • Provided by: [D].Flora de Nicaragua
    • Source: [
    • 3
    • ]. 

    Herbaceous vines; stems pilose, often drying hollow; rootstock tuberous. Leaves pinnate trifoliolate, the leaflets ovate to broadly ovate, the terminal leaflet broadest and often 3-7 lobed, the sinuses and lobes acute or rounded, mucronate, the lateral leaflets oblique, often less lobed or entire, basally deltoid, 3-veined from the base, drying slightly discolorous, glabrate or densely soft tomentose; petiolules 4-5 mm long, stout, pilose; petioles and rachis slender, drying angled, pubescent; stipels 1-2 mm long, acicular, sericeous, basally extended into definite ribs on the rachis; stipules minute, caducous. Inflorescences axillary pseudora- cemes, mostly 12-20 cm long, the flowers congested near the apex, the peduncle mostly longer and stouter than the petioles, the bracteoles resembling the stipels, subtending and much shorter than the calyx; pedicels ca. 2 per node, slender, ca. 5 mm long. Flowers blue, calyx 5-8 mm long, tubular, 2-lipped, the upper 2 teeth mostly connate, the lower 3 acute or acuminate, shorter than the tube, subequal or the lowermost longest and acuminate; standard ca. 15 mm long, suborbicular, emarginate, the wings and the keel about as long as the standard, sometimes ciliolate. Legume oblong, ca. 10 cm long, 1.5-2 cm wide, compressed, appressed strigose.

  • Provided by: [B].Flora de Panama
    • Source: [
    • 4
    • ]. 

    Bejuco rastrero o trepador, los tallos herbáceos a subleñosos, las ramitas pilosas a glabrescentes. Hojas con los folíolos 3.4–18 X 4–20 cm, oblicuamente rómbicos u ovados, agudos a mucronatos en el ápice, enteros o leve a profundamente 3–7-lobulados, ásperos en el haz. Infls. (4.4–)8.4–45(–55) cm. Fls. blancas o azules; cáliz 7.5–13 mm; pétalos 15–25 mm. Frs. 6–13 X 0.8–1.2(–1.7) cm, hirsutos o glabros; semillas (3–)5.5–8(–9) X (4–)5– 7.5(–9) mm, lenticulares a suborbiculares.

  • Provided by: [C].Manual de Plantas de Costa Rica
    • Source: [
    • 5
    • ]. 

    Habit

    vines

  • Provided by: [B].Flora de Panama
    • Source: [
    • 4
    • ]. 

    Liana/volúvel/trepadeira

  • Provided by: [E].Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
    • Distribution

      ranges throughout the Neotropics and has been introduced and naturalized in parts of the Old World.

    • Provided by: [B].Flora de Panama
      • Source: [
      • 4
      • ]. 

      Distribution Map

       
      • Introduced distribution
      Introduced into
      • Southern America Brazil Amazonas
      • Tocantins
      • Bahia
      • Piauá
      • Minas Gerais
      • São Paulo
      • Goiás

      Other Local Names

      NameLanguageCountry
      Yam Bean Jicama

       Information From

      Fabaceae
      World Flora Online Data. 2017.
      • A CC0 1.0 Universal (CC0 1.0).
      Flora de Panama
      http://www.tropicos.org/Project/PAC
      Robert E. Woodson, Jr. and Robert W. Schery Annals of the Missouri Botanical Garden Vol. 67, No. 4 (1980), pp. ii-xxxiii
      • B Missouri Botanical Garden
      Manual de Plantas de Costa Rica
      http://www.tropicos.org/Project/Costa%20Rica
      Hammel, B. E.; Grayum, M. H.; Herrera, C.; Zamora, N. Manual de Plantas de Costa Rica. Missouri Botanical Garden Press, 2003-2014
      • C Missouri Botanical Garden
      Flora de Nicaragua
      http://www.tropicos.org/projectwebportal.aspx?projectid=7&pagename=Home&langid=66
      WD Stevens, CU Ulloa, A Pool and OM Montiel. Missouri Botanical Garden Press, 2001
      • D Missouri Botanical Garden
      Brazilian Flora 2020 project - Projeto Flora do Brasil 2020
      http://floradobrasil.jbrj.gov.br
      Brazil Flora G (2014): Brazilian Flora 2020 project - Projeto Flora do Brasil 2020. v393.147. Instituto de Pesquisas Jardim Botanico do Rio de Janeiro. Dataset/Checklist. doi:10.15468/1mtkaw
      • E Group Brazil Flora, REFLORA Program
      Flora Of CHina @ efloras.org
      http://www.efloras.org/flora_page.aspx?flora_id=2
      'Flora of China @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=2 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
      • F Missouri Botanical Garden
      World Flora Online consortium
      http://www.worldfloraonline.org/organisation/WFO
      World Flora Online Data. 2018.
      • G CC0 1.0 Universal (CC0 1.0).