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Sabicea panamensis Wernham

Sabicea-panamensis2.jpg <i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2012/08/19/20120819184151-10577063-th.jpg>Miniatures<i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2015/07/14/20150714121916-f67f9e55-th.jpg><i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2012/08/19/20120819184151-10577063-th.jpg>Miniatures<i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2015/07/14/20150714121916-f67f9e55-th.jpg><i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2012/08/19/20120819184151-10577063-th.jpg>Miniatures<i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2015/07/14/20150714121916-f67f9e55-th.jpg><i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2012/08/19/20120819184151-10577063-th.jpg>Miniatures<i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2015/07/14/20150714121916-f67f9e55-th.jpg><i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2012/08/19/20120819184151-10577063-th.jpg>Miniatures<i>Sabicea panamensis</i> Wernham||<img src=./_datas/7/j/l/7jlks0o8hr/i/uploads/7/j/l/7jlks0o8hr//2015/07/14/20150714121916-f67f9e55-th.jpg>

17 octobre 2011 : chemin forestier, montagne de Kaw.

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  • invité - Samedi 18 Juillet 2015 21:45
    C'est plutôt Sabicea aspera. S. panamensis a les inflorescences plus ramifiées.
  • floredeguyane - Dimanche 19 Juillet 2015 23:06
    L'angle de la prise de vue est trompeur. Voir cette autre photo de la même plante :
    http://floredeguyane.piwigo.com/picture?/17250/category/855-sabicea_panamensis
    On voit que l'inflorescence est ramifiée et que les fleurs sont pédicellées. Chez S. aspera les fleurs sont vraiment sessiles, ou presque.
    Dans un premier temps, j'avais moi aussi pris cette plante pour S. aspera, mais selon Charlotte Taylor elle est plus proche de S. panamensis.
  • floredeguyane - Samedi 18 Novembre 2017 09:55
    Sabicea aspera est maintenant présente sur le site. En tous cas la plante que je nomme comme ça, avec beaucoup d'incertitude. Sur le terrain, je distingue les deux espèces sur deux critères : inflorescences franchement sessiles --> S. aspera, inflorescences ramifiées, même brièvement --> S. panamensis, lobes de la corolle glabres --> S. aspera, lobes de la corolle ciliés --> S. panamensis. Je ne sais pas si ce dernier critère est pertinent d'ailleurs, en conclusion j'ai beaucoup de mal à distinguer les deux espèces...
    Je publie le message que Charlotte Taylor m'a envoyé il y a 5 ans, là aussi on lit l'incertitude:
    "Thank you very much for sending me the link to the nice photos. -- What this species is, is a good question in my opinion....

    First, I have never completely understood the separation of Sabicea aspera and Sabicea glabrescens. These have been separated by Steyermark and others by the size and shape of the stipules and the amount of pubescence. Steyermark separated Sabicea aspera by its broader stipules and denser pubescence; however plants with sparse pubescence that he identified as Sabicea glabrescens have stipules that are similar to those of Sabicea aspera. Both of these are relatively short broad stipules that are dark brown adaxially in dried specimens. There was a person who studied Sabicea several years ago, and concluded that these are varieties of the same species; however that work was never published.

    The plants you photographed have been included in Sabicea aspera in the herbarium identifications of some people -- however I think they are different. Sabicea aspera has sessile capitate inflorescences, that is, with the flowers and fruits sessile or subsessile. These plants have branched inflorescences with pedicellate flowers. For me, these either belong to or are more closely related to Sabicea panamensis (other names that have been used include Sabicea colombiana and Sabicea paraensis). This species does not get into Venezuela or Guyana, but it is found in the Amazon basin and ranges into French Guiana, where you are. We have more specimens here of your plant.

    The person who studied Sabicea included these plants with pedicellate flowers also in Sabicea aspera/glabrescens, and he may be correct but I am not convinced. Maybe you can go look at these in the field and see if you can find and separate Sabicea aspera/glabrescens with sessile glomerate inflorescences and the species in your photos; or maybe you can find variation that indicates that the person who studied Sabicea is correct and my idea is wrong. In either case, your field observations would be helpful.

    best, Charlotte"