Browsing Research Articles (Plant Science) by Author "Grace, Olwen Megan"

Browsing Research Articles (Plant Science) by Author "Grace, Olwen Megan"

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  • Characterisation of a nataloin derivative from Aloe ellenbeckii, a maculate species from east Africa 
    Grace, Olwen Megan; Kokubun, T.; Veitch, N.C.; Simmonds, Monique S.J. (Elsevier, 2008)
    6′-Malonylnataloin, a malonylated derivative of the rare anthrone nataloin, is characterised for the first time from Aloe ellenbeckii A. Berger. Anthrone C-glycosides are among a suite of chemical constituents of systematic ...
  • Chemosystematic evaluation of Aloe section Pictae (Asphodelaceae) 
    Grace, Olwen Megan; Simmonds, Monique S.J.; Smith, G.F. (Gideon Francois), 1959-; Van Wyk, Abraham Erasmus (Braam) (Elsevier, 2010-02)
    The chemosystematic value of UV-absorbing leaf constituents was considered in previously uncharacterised representatives of Aloe section Pictae, the problematic maculate species complex. Comparative data indicate that the ...
  • The correct names for species of aloe sect. Chortolirion (Asphodelaceae: Alooideae) 
    Klopper, Ronell Renett; Smith, G.F. (Gideon Francois), 1959-; Figueiredo, Estrela; Grace, Olwen Megan; Van Wyk, Abraham Erasmus (Braam); Moore, Gerry; Lendemer, James; Tripp, Erin (International Association for Plant Taxonomy, 2013-12)
    The correct names and synonymy for species of Aloe sect. Chortolirion (A. Berger) Boatwr. & J.C. Manning (Asphodelaceae: Alooideae) are provided. This treatment recognises four species in this section, namely A. welwitschii, ...
  • Evolutionary history and leaf succulence as explanations for medicinal use in aloes and the global popularity of Aloe vera 
    Grace, Olwen Megan; Buerki, Sven; Symonds, Michael E.; Forest, Felix; Van Wyk, Abraham Erasmus (Braam); Smith, G.F. (Gideon Francois), 1959-; Klopper, Ronell Renett; Bjorå, Charlotte S.; Neale, Sophie; Demissew, Sebsebe; Simmonds, Monique S.J.; Rønsted, Nina (BioMed Central, 2015-02)
    BACKGROUND : Aloe vera supports a substantial global trade yet its wild origins, and explanations for its popularity over 500 related Aloe species in one of the world’s largest succulent groups, have remained uncertain. ...
  • Reinstatement of Aloe barbertoniae pole-Evans (Asphodelaceae: Alooideae) from northeastern South Africa 
    Klopper, Ronell Renett; Smith, G.F. (Gideon Francois), 1959-; Grace, Olwen Megan; Crouch, Neil R. (British Cactus and Succulent Society, 2014)
    Aloe barbertoniae Pole-Evans, which has previously been included in the synonymy of A. greatheadii Schönland var. davyana (Schönland) Glen & D.S.Hardy, is here reinstated. This species is adapted to the subtropics of ...
  • Reinstatement of Aloe graciliflora Groenew. (Asphodelaceae: Alooideae), a maculate aloe from north-east South Africa 
    Klopper, Ronell Renett; Grace, Olwen Megan; Smith, G.F. (Gideon Francois), 1959-; Figueiredo, Estrela (British Cactus and Succulent Society, 2011)
    Aloe graciliflora Groenew., which has previously been included in the synonymy of A. greatheadii Schönland var. davyana (Schönland) Glen & D.S.Hardy, is here reinstated. This species is adapted to the climatic extremes ...
  • A revised generic classification for Aloe (Xanthorrhoeaceae subfam. Asphodeloideae) 
    Grace, Olwen Megan; Klopper, Ronell Renett; Smith, G.F. (Gideon Francois), 1959-; Crouch, Neil R.; Figueiredo, Estrela; Rønsted, Nina; Van Wyk, Abraham Erasmus (Braam) (Magnolia Press (open access), 2013)
    The predominantly southern African Xanthorrhoeaceae subfam. Asphodeloideae (Asphodelaceae subfam. Alooideae) has long been regarded as comprising seven so-called alooid genera (Aloe, Astroloba, Chortolirion, Gasteria, ...