The encyclopedia and open conservation database for landrace cannabis populations, their genetics and the traditional knowledge that sustains them.
Accession Map
Filter by collection year, classification, priority or provenance, and select a marker for accession details. Every figure on this card describes the accessions currently shown. A further 226 documented accessions carry no coordinates yet and cannot be mapped.
Explore the database
Herbarium specimen from Samalkot (1822)
Anon. s.n., Samulcottah is a herbarium accession of Cannabis sativa labelled Samulcottah and dated October 1822. No collector is named, on the sheet or in the catalogue. Samulcottah is Samalkot, the East India Company station in the Northern Circars whose port was Kakinada; it is now in Kakinada District, Andhra Pradesh, India. The Royal Botanic Garden Edinburgh holds the sheet as catalogue E00248825. GBIF publishes it as occurrence 574753869.
Featured growing regions and areas

Hem Chunder Kerr
Hem Chunder Kerr was an Indian officer in the service of the Government of Bengal who compiled two official enquiries into Bengal commodity crops: a report on jute, published in 1874, and the Report on the Cultivation of, and Trade in, Gánjá in Bengal, which he submitted to the Board of Revenue on 2 April 1877.
The ganja report was the first detailed official account of ganja cultivation in the Ganja Mahal of Naogaon, and it remained the standard description for the rest of the century. The House of Commons ordered it reprinted in 1893, and the Indian Hemp Drugs Commission, reporting the following year, called it the basis of the information furnished by most of its witnesses. Kerr himself gave written evidence to the Commission in 1893–94, by which time he had retired from the grade of Deputy Magistrate and Deputy Collector and was serving as Sub-Registrar of Sealdah. read more →
Encyclopedia
Latest publications
Latest reporting
Eradications
Recently updated
Start with the record
Learn what an accession is, how to read its fields and maps, and what its conservation priority means.
Know a landrace? Help document it.
Field observations, photographs, corrections, sources and translations all strengthen the open record.