More than 1000 institutions from 48 countries publish Index Seminum with the intention of establishing a free and fair exchange.
Generally there are several items that are included in the listings: The classification of plant species is made by alphabetical order of the families to which they belong, and another by genus.
It is important that the origin of the seeds is well specified, clarifying whether they were collected outside or inside the botanical garden itself.
[2] In the 21st century this tradition is reexamined in the context of the conservation of biodiversity and the fight against invasive species.
In 1800 Casimiro Gómez Ortega published the first Index Seminum[4] of the Royal Botanical Garden of Madrid.