Thread-based services like Twist or Spectrum might be a lot more well-suited to this kind of group, assuming that it a) begins initially as a more general 'area-of-interest' group, and b) is intended to be a remote group rather than local.
Hanakotoba (花言葉) is the Japanese form of the language of flowers. In this practice, plants were given codes and passwords. Physiological effects and action under the color of the flowers, put into words from the impressions of nature and the presence of thorns with the height of tall plants, flowers and garlands of flowers through the various types. These are meant to convey emotion and communicate directly to the recipient or viewer without needing the use of words.