• 

  Angiosperm families - Gesneriaceae Dum.

  http://www.delta-intkey.com/angio/www/gesneria.htm

  Description of Gesneriaceae Dum., generated from a DELTA database.

• 

  Angiosperm families - Thunbergiaceae Van Tiegh.

  http://www.delta-intkey.com/angio/www/thunberg.htm

  Description of Thunbergiaceae Van Tiegh., generated from a DELTA database.

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