All seeds are labelled with the verification-code*, origin-code**, collection-number, scientific name and origin-data. The taxonomic names are based on the Missouri Botanical Garden's VAST (VAScular Tropicos) nomenclatural database. Specimens collected in the Netherlands are named according to Heukels’ Flora van Nederland, 1996. All angiosperms are listed according to the Angiosperm Phylogeny Group classification, based on molecular systematics. See also: http://www.mobot.org/MOBOT/research/APweb/. All pteridophytes are listed according to K.U. Kramer in K. Kubitzki, 1990.
* verification-code:
0 = the name has not been determined by any authority
2 = the name has been determined by a taxonomist or other competent person
3 = the name has been determined by a specialist (taxonomist working on that group)
** origin-code:
E = Seeds collected in the wild
S = Seeds from a plant in cultivation but from known natural source
G = Seeds from a plant from an other botanical garden, not from known natural source
H = Seeds from plants confiscated by custom
K = Seeds from a plant from a nursery, not from known natural source
U = Seeds from plants of unknown origin