Your pint and your mate's joint share a family tree. Humulus lupulus (hops) and Cannabis sativa (cannabis) are both members of the botanical family Cannabaceae — the only two genera of commercial significance in a family that diverged from a common ancestor roughly 28 million years ago. The relationship isn't distant or metaphorical. It's written in their DNA, their chemistry, and the resinous glands that make both plants valuable to humans.
The family resemblance runs deeper than taxonomy. Both species produce terpenes — aromatic compounds — through nearly identical biochemical pathways. Myrcene, the terpene responsible for the earthy, herbal character in both hoppy beers and cannabis strains, is synthesised by homologous enzymes in both plants. Humulene, named after hops themselves, appears in both species. Linalool, pinene, caryophyllene — the aromatic overlap is so extensive that trained noses sometimes struggle to distinguish concentrated hop oil from cannabis extract in blind tests.
The physical similarity is equally striking. Both plants produce trichomes — tiny resinous glands that cover their flowers. In hops, these lupulin glands contain the alpha acids and essential oils that give beer its bitterness and aroma. In cannabis, analogous trichomes produce cannabinoids and terpenes. Under a microscope, the glandular structures are nearly indistinguishable. Both evolved these sticky, aromatic defences for the same evolutionary purpose: deterring herbivorous insects while attracting pollinators.
The connection has practical implications that go beyond pub trivia. Researchers at the University of British Columbia successfully grafted cannabis scions onto hop rootstock in 2019, demonstrating that the plants are compatible enough to share vascular systems. In commercial agriculture, hop growers and cannabis cultivators face identical pest pressures — spider mites, powdery mildew, and aphids attack both crops with equal enthusiasm. Pesticide protocols developed for hops are frequently adapted for legal cannabis operations.
The brewing industry hasn't ignored the kinship. Terpene-forward "cannabis-inspired" IPAs have become a recognised style, with brewers selecting hop varieties specifically for their myrcene and humulene profiles to evoke cannabis aromatics — legally, without any THC content. Conversely, the cannabis industry has borrowed hop-derived terpenes to enhance strain profiles, creating a bizarre circular economy between the two cousins.
Twenty-eight million years of separate evolution, and both species ended up in the same human story: cultivated for their resinous chemistry, consumed for their psychoactive or flavour-altering properties, and now — in states where both are legal — increasingly sold side by side. The family reunion is well underway.