If you did not find the "Amerikan Kartopu" you are looking for, here are some ideas:

Perhaps you found "Amerikan Kartopu" in a book, another catalogue or among personal communications
B and T World Seeds may be using a different spelling ( there are typos in our database - please tell Matthew if you find any )

Try a more simple search. If you are looking for Purple Jimsonweed Datura try just Purple weed, for a broad search, or Purple Jimson for a narrow search.
Common name search also allows for searches with just bits of the name: Pur Jim Useful if you only have part of the name. Spaces are used as wildcards, so missing parts of words will be filled in..

Herbal Medicinal names frequently refer to the part of the plant used and a version of the Latin name, for example "Belladonnae Radix", are the roots of Atropa belladonna ( the botanical name is sometimes written Atropa bella-donna ).

Some uses for plants are included in our common names, so fuel will find some plants useful for fuel, and aphro will find some plants reputed to have aphrodisiac properties.

Check google, to see whether "Amerikan Kartopu" is the correct common plant name.
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Botanical name:

Common Name: