The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.


  • Biegel, H.M. (1977) Check-list of ornamental plants used in Rhodesian parks and gardens. Rhodesia Agricultural Journal. Research Report No. 3. Page 25
  • Flann C. (ed) (2015). GCC: Global Compositae Checklist (version 5 (Beta), Jun 2014). In: Species 2000 & ITIS Catalogue of Life, 26th August 2015 (Roskov Y., Abucay L., Orrell T., Nicolson D., Kunze T., Flann C., Bailly N., Kirk P., Bourgoin T., DeWalt R.E., Decock W., De Wever A., eds). Digital resource at Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-8858.
  • Marticorena C & R Rodríguez . 1995-2005. Flora de Chile. Vols 1, 2(1-3). Ed. Universidad de Concepción, Concepción. 351 pp., 99 pp., 93 pp., 128 pp. Matthei O. 1995. Manual de las malezas que crecen en Chile. Alfabeta Impresores. 545 p.
  • Nuovo Giornale Botanico Italiano, n.s. 36(3): 381. 1929. (Nuovo Giorn. Bot. Ital., n.s.,)
  • Trudy Instituta Botaniki. Alma-Ata 11: 166. 1961. (Trudy Inst. Bot. (Alma-Ata))
  • Type collection: Watson, S. 1888. Proc. Amer. Acad. Arts. 23: 279.


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