Missouri Botanical Garden - w3TROPICOS Index to Plant Chromosome Numbers Data Base -

Index to Plant Chromosome Numbers (IPCN)

NEW Lists of all counts for a Genus are now available by e-mailed downloads at IPCN2 or

Select a family then submit to view list of taxa in the IPCN data base

The Index to Plant Chromosome Numbers is an NSF funded project that aims to extract and index original plant chromosome numbers of naturally occurring and cultivated plants published throughout the world. A committee of voluntary contributing editors, located in various parts of the world, reviews sets of serial titles assigned to them and returns the information to the editors for collation in the Index and database. Chromosome indexes are published at two or three year intervals. The Index to Plant Chromosome Numbers project has been based at the Missouri Botanical Garden since 1978. Data from published indexes from 1979 onward are available for consultation through this facility.

For additional information, see the last supplement by Goldblatt & Johnson 2006. Index to Plant Chromosome Numbers 2001-2003. Monographs in Systematic Botany from the Missouri Botanical Garden 106.

An Index covering the years 2004-2006 is in preparation and will be published in the fall of 2008 as: Goldblatt & Johnson 2008. Index to Plant Chromosome Numbers 2004-2006. Monographs in Systematic Botany from the Missouri Botanical Garden.

Many but not all data in the printed version of the Index to Plant Chromosome Numbers (1979-- ) are available on the Web in the IPCN database. The printed indexes and the database provide references to chromosome counts reported in the original literature. We therefore request that the IPCN database itself not be cited as the source for chromosome counts. If there is a need to cite the IPCN database, we recommend the following:

Index to plant chromosome numbers. 1979--  . P. Goldblatt & D. E. Johnson, eds. Missouri Botanical Garden, St. Louis.