@book{Gronovius2006,
  author    = {Johannes Fredericus Gronovius},
  title     = {Flora Virginica : exhibens Plantas quas V. C. Johannes Clayton in Virginia observavit atque collegit},
  url       = {http://caliban.mpiz-koeln.mpg.de/~stueber/gronovius/index.html},
  year      = {2006},
}