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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 accessionZOM-THA-PHU-0420240002

Thailand Collected 2024 Landrace Critical priority

Krabangkham 'Squirrel Tail' Selection 2023 is a domesticate landrace cannabis accession. This accession was documented by Éloïse in April 2024. A total of 10,000+ seeds were purchased by Éloïse from Suriyan, the owner of Krabangkham Farm. The seeds come from a landrace cannabis population of 500+ plants grown near Ban Nan Toeng. Ban Nan Toeng is located in Phu Phan District, Sakhon Nakhon, Thailand, within the Phu Phan Mountains landrace cannabis growing area of the Northeastern Thailand growing region.

PopulationSelectionMonoeciousShort-day

Recorded usesRecreation, Medicine, Food

CollectionSeedsPoint of Origin2023

Field cyclePlant July–SeptemberHarvest January–March

PreservationZomia Genetic Library

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Places

Featured growing regions and areas

Growing region

Southern Laos

Mekong Basin

Southern Laos landrace cannabis growing region

Cardamom Mountains

Southern Cambodia

Chamurchi-Laxmi Duar

The Dooars

Chapramari

The Dooars

Gorumara

The Dooars

All 11 growing regions · All 22 growing areas

Pharmakologisch-medicinische Studien über den Hanf (1856)

Featured article

The Pharmakologisch-medicinische Studien über den Hanf ("Pharmacological-Medical Studies on Hemp") is the inaugural dissertation of Dr. Georg Martius of Erlangen, published in Leipzig by Leopold Voss in 1856. The work surveys the hemp plant across four domains: history, botany, pharmacognosy and chemistry. It includes a chronological bibliography of approximately 200 pre-1856 references on cannabis spanning three centuries and is one of the earliest German academic works to treat the subject systematically.

On the question of whether Indian hemp constitutes a separate species, Martius sides with Kaempfer, Willdenow and Roxburgh against Lamarck. He synthesises Alexander Christison's 1849–1851 Edinburgh grow-out experiments, which produced taller plants with narrower leaf segments but no visible resin, to argue that resin production reflects climatic expression rather than fixed botanical distinction.

The dissertation was partly enabled by a shipment of fresh hashish from Dr. Steege, a court pharmacist (Hofapotheker) in Bucharest. … 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