As per Flora of Guatemala, the outer sepals of Antigonon guatimalense Meisn. should be broadly ovate and not cordate at the base. Further the leaf base should be abruptly decurrent at the base upon the petiole. The type specimen of A. guatimalense Meisn. can be seen here ( http://apps.kew.org/herbcat/getImage.do?imageBarcode=K000585039) for confirmation.
Hence to me the posted picture appears as Antigonon leptopus Hook. & Arn. only. Experts may comment. Regards, Ritesh. -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
