The Flowers of all orchids are constructed on a certain basic formula.  There is an outer whorl of three generally similar segments called sepals.  In some genera, such as Paphiopedilum, the two lateral sepals are fused into one unit, then called the synsepal.  Within the sepals is another whorl of three segments called petals.  The median petal is almost always differentiated from the other two by size, color and/or complexity and is called the labellum or lip. Making up the center of the flowers is the column, representing the fusing of elements of the stamens and pistil.  Unimaginable variation of the basic floral plan among the thousands of species and their hybrids allows for a never-ending fascination with the orchid family or Orchidaceae.


     This Mailing list intends to be a low message number list that deals with exclusively scientific matters related to orchids. Taxonomy, ecology, physiology, molecular biology, canopy research etc, are welcome subjects. It is not intend to split from the list "orchids", but only give room for more specialized issues that would not have place here. In order to subscribe, send a message to LISTSERV@BDT.ORG.BR, with the message SUBSCRIBE ORCHID-BIOLOGY . You can read more at their web site:                   http://www.bdt.org.br/bdt/orchid-biology