The Collaborative International Dictionary of English v.0.48:

panamica \panamica\ n.
   A low stingless nettle (Pilea involucrata) of Central and
   South America having velvety brownish-green toothed leaves
   and clusters of small green flowers.

   Syn: friendship plant, panamiga, Pilea involucrata.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

panamica
    n 1: low stingless nettle of Central and South America having
         velvety brownish-green toothed leaves and clusters of small
         green flowers [syn: friendship plant, panamica,
         panamiga, Pilea involucrata]