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A neutral, independent encyclopedia and open conservation database for landrace cannabis populations, their genetics and the traditional knowledge that sustains them.

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403Landrace accessions

22Growing areas

11Growing regions

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46%of documented landrace accessions are assessed as critical or high conservation priority. Help document them

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An accession is a sample or observation recorded at a specific place and time. An appellation is a locally recognised name tied to place and tradition.

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Featured accessionLörzing 6821 (1919)

Indonesia Collected 1919 Herbarium specimen

Lörzing 6821 is an accession record for a pressed herbarium sheet collected by J.A. Lörzing near Berastagi on the Karo plateau, Sumatra, on 23 July 1919. Naturalis Biodiversity Center holds the sheet as catalogue L.1592671. GBIF records it as preserved specimen occurrence 2513890865, identified as Cannabis sativa L. by J.J. Smith. The record fixes a locality, date, coordinates, and elevation, but does not establish whether the source plant was cultivated, spontaneous, or an escape and therefore does not support a landrace or feral classification.

CollectionHerbarium specimenHistorical

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Places

Featured growing regions and areas

Growing region

Western Himalayas

Himalayas

Major Himalayan charas-producing cultivation region across northern India's temperate valleys and highland basins

Chapramari

The Dooars

Gorumara

The Dooars

Jaldapara

The Dooars

Jalpaiguri

North Bengal Plains

All 11 growing regions · All 22 growing areas

Report on the Cultivation of, and Trade in, Ganjá in Bengal (1877)

Featured article

Report on the Cultivation of, and Trade in, Ganjá in Bengal is a special report by Hem Chunder Kerr, Deputy Collector on Special Duty to the Board of Revenue, Lower Provinces of Bengal, submitted at Calcutta in April 1877 and published the same year by the Bengal Secretariat Press. Sixteen years later it was reprinted in full in the House of Commons Parliamentary Paper East India (Consumption of Ganja), laid before Parliament on 21 February 1893, where it remains the most accessible form of the text.

Across roughly 110 numbered paragraphs the report describes the Ganja Mahal, the licensed ganja-cultivation tract in the Naogaon subdivision of Rajshahi (present-day Bangladesh), as Kerr observed it during a survey tour in 1876–77. It covers the etymology and botany of the plant, the agronomic calendar of cannabis cultivation practised by the licensed chāsi, the manufacture of the three product grades (flat, round and chur), the apparatus of licensing and the wholesale ganja trade and the economics of the cultivator class. … read more →

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Research

18 Jul 2026 · Journal of Cannabis Research

Terroir-driven phenolic chemotypes and antioxidant/antimicrobial activities of Beldia (Cannabis sativa L.) seed extracts

Abstract Geographical variation in the phenolic composition and bioactivity of Moroccan Beldia (Cannabis sativa L.) seeds remains insufficiently characterized, limiting their rational valorization as bioactive resources. This study investigated aqueous extracts from defatted seeds collected in Ketama, Taounate, and Ouazzane using HPLC–DAD phenolic profiling, antioxidant and antimicrobial assays, and molecular docking. Data are reported as mean ± SD (n = 3), and regional differences were evaluated by one-way ANOVA followed by Tukey’s test when applicable. Clear regional discrimination was observed. Ouazzane gave the highest extraction yield (8.08 ± 0.24%), total phenolic content (16.13 ± 0.48 mg GAE/100 g DM), total flavonoid content (6.78 ± 0.20 mg QE/100 g DM), and total antioxidant capacity (565.80 ± 5.90 mg AAE/g), whereas Ketama showed the strongest DPPH scavenging activity (IC₅₀ = 10.25 ± 0.03 µg/mL). HPLC–DAD revealed distinct chemotypes dominated by 4-hydroxybenzoic acid (33.26–36.63%), with Taounate enriched in vanillic acid (35.00%) and caffeic acid (20.44%). Antimicrobial assays showed the best MIC values against Micrococcus luteus (0.50 ± 0.01 mg/mL) and Geotrichum candidum (0.12 ± 0.00 mg/mL). Docking highlighted flavonoid-type constituents as the most plausible active contributors, with catechin hydrate and rutin showing the strongest affinity toward CYP51 (-9.6 kcal/mol). Moroccan terroir strongly shapes the functional profile of Beldia seed extracts and supports region-guided sourcing for future bioactive applications.

Source

1 Jul 2026 · Plant Disease

Screening Diverse Cannabis sativa Germplasm for Resistance to Golovinomyces ambrosiae

Source

30 Jun 2026 · Acta Theologica

Cannabis Sativa, religion and society: Historical, medicinal, legal, and sacramental perspectives

Source

28 Jun 2026 · International Journal of Drug Policy

Value capture in the emerging medical cannabis global value chain: insights from South Africa

Source

19 Jun 2026 · bioRxiv

Sex chromosome-aware GWAS reveals XY-linked agronomic architecture and breeding targets in cannabis