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Verification codes used (ITF):

The seeds in this list have been taken from verified plants and only if we were reasonably sure that cross-pollination with related species would be unlikely. Verification codes used:

Explanation of provenance codes of the plants (ITF):


IPEN-Number:


The first two positions are the iso-code of the country of origin. XX means: country of origin unknown.
The next position is a digit meaning: special restrictions (1) or not (0).
The next position is the acronym (IPEN garden code) of the garden that introduced the accession into the IPEN network (our garden U).
The rest consists of the internal accession number (see below)
The IPEN-number as a whole stays attached to the accession, wherever it may go, so that it will always be possible to trace back its origin.
Accession Numbers:
The first four digits indicate the year of registration, (1900 = unknown year of entry).
The next two characters are coding for the garden location or specific group of plants:
The last 5 digits is a sequence number within that year.

Seed collection year

The year the seeds has been collected is given, next to an asterisk, e.g. *2013