Autumn Crocus

The lilac autumn goblet sold as a garden bulb that is not a crocus at all - lethally poisonous with no antidote, delayed symptoms, and two documented fatal confusions: wild garlic in spring and saffron in autumn.

This is not a plant to put in - it is one to recognise. Two checks matter: no onion smell on the spring leaves, and six stamens rather than three on the autumn flower.

The catalog does not offer this for planting, so what follows is recognition — of a plant you may already have inherited in a lawn or border, or may meet while foraging.

The year runs backwards. Large lilac-pink goblets on a long pale tube appear from bare ground in late summer and autumn, with no leaves. The leaves come months later, in late winter and spring: a tight rosette of broad, thick, glossy, stalkless strap leaves 8 to 12 inches long, which yellow and disappear by midsummer, leaving a fat brown-tunicked corm underground.

Against ramps and wild garlic (spring leaves). Three checks, and the first is decisive.

Smell. Crush a leaf. A true wild Allium smells powerfully and unmistakably of onion or garlic. Colchicum has no smell at all. No smell, no eating.

The stalk. Ramps leaves each rise on their own distinct stalk, usually flushed reddish-purple at the base. Colchicum leaves are stalkless and sheathed tightly together straight from the corm.

The seed pod. From mid-spring a fat green three-parted capsule often sits at ground level in the middle of a Colchicum rosette — the fruit of last autumn's flower, ripening half a year later. No Allium ever does this. Habitat helps too: ramps carpet shaded rich woodland, Colchicum grows in open grass, meadows, orchards and gardens.

Against saffron crocus (autumn flowers). Two checks, both simple.

Count the stamens. Every true crocus has three. Colchicum has six. That single count settles it.

Look for the red threads. Saffron crocus carries three long, deep-red, thread-like stigmas hanging clear of the flower — those threads are the saffron. Colchicum has three white to pale-yellow styles and never red ones. Saffron crocus also produces narrow grass-like leaves with a white midrib at flowering time; Colchicum flowers on bare ground. If there are no red threads, there is no saffron.

If you have inherited it: gloves for everything, corms out of sheds and away from food, seed capsules removed before they open on grazed or mown ground, and full excavation if you want it gone.

Most people meet this plant by inheriting it — in an old border, naturalised in rough grass, or spreading through a lawn. Living with it means a few clear habits.

Gloves for every job, and wash afterwards. Keep the plant, the corms and the seed heads away from food preparation entirely.

Get loose corms out of the shed. A dormant Colchicum corm looks very like a shallot, and corms sold in late summer routinely end up in a drawer or a crate near onions or seed potatoes. If any exist, label them; better, dispose of them.

Remove seed capsules before they split, in late spring, anywhere the ground is grazed, mown for hay, or walked by children. Bag them for municipal green waste — never compost.

Keep it out of pasture and hay ground altogether. Colchicine survives drying, so a plant cut into hay poisons animals all winter, and it is a recognised cause of cattle loss in European meadows.

Removing it takes digging, not mowing. The corm sits deep, 6 to 8 inches down, and mowing the leaves simply removes the food supply slowly rather than killing it. To clear a patch, dig each corm out whole with a fork in gloves, take the offsets with it, bag everything, and go back the following spring for whatever was missed. Repeated removal of the spring leaves over several seasons will exhaust a colony you cannot dig, but it is a matter of years, not weeks.

Any suspected ingestion is an emergency - call poison control immediately and do not wait for symptoms, because with colchicine the delay before symptoms is the whole danger.

Someone has eaten any part of this plant, or a wild green that might have been it. This is a medical emergency. Call poison control or emergency services immediately and do not wait for symptoms — that instruction matters more here than for almost any other plant, because colchicine's effects are delayed by two to twelve hours. Feeling fine is not reassurance; it is the expected state early on. What follows typically begins with burning in the mouth and throat and severe vomiting and diarrhoea, and can progress over days to damage of the blood, kidneys, liver and heart. There is no antidote; treatment is urgent, prolonged supportive hospital care. Take a piece of the plant with you if you can.

“I may have picked this instead of ramps or wild garlic.” Do not taste it to find out. Discard the entire batch. One misidentified leaf contaminates everything gathered with it, and you cannot sort it afterwards. If any has been eaten, treat it as an emergency regardless of how well the person seems.

“I harvested saffron from a lilac autumn flower.” Throw it away. Saffron is three deep-red threads from a three-stamened flower. If what you picked had six stamens, or pale styles rather than red threads, it was Colchicum, and no amount of drying or cooking makes it safe.

Pets and livestock. Dogs dig and chew corms, and grazing animals eat the spring leaves and hay containing them. Contact a veterinarian immediately and name the plant.

It keeps coming back after mowing. Expected. Mowing removes leaves, not the corm 6 to 8 inches down. See Care.

The source of colchicine, a genuine and valuable modern drug for gout - and one with so narrow a margin that overdoses of the prescribed tablet have killed. Nothing about that makes the plant preparable at home.

This section records how people have traditionally used this plant, and what is known about the risks. It is history and general information — not medical advice, and not a recommendation to treat anything. Plants are not dosed like medicines, some interact with prescriptions, and some are harmful in ways that are not obvious. Talk to a clinician before using any plant medicinally.

Colchicine is a real and important medicine. It is prescribed for acute gout, familial Mediterranean fever and pericarditis, and more recently for inflammation in cardiovascular disease, and it was isolated from this plant in 1820. The use is ancient: preparations of Colchicum for joint pain appear in Egyptian and Greek medical texts more than two thousand years old.

It is also the clearest possible argument against home preparation. Colchicine has one of the narrowest therapeutic margins in ordinary clinical use — deaths have occurred from overdoses of the manufactured, precisely assayed tablet, prescribed by a doctor. There is no antidote, and the alkaloid content of an actual corm varies with the plant, the season and the part.

There is no safe home preparation of autumn crocus — no tea, no tincture, no poultice, no dose. If colchicine is the right treatment for someone, it comes as a measured tablet from a pharmacy. This is educational information, not medical advice.

An ancient gout remedy, the plant that gave chemistry colchicine, and - improbably - the reason a great many modern seedless and large-flowered crops exist at all.

Colchicum takes its name from Colchis, the region on the Black Sea associated in Greek myth with the sorceress Medea and her poisons, and it has been known as both remedy and poison for as long as it has been written about. Egyptian and Greek physicians used it for joint pain; Byzantine and medieval writers repeated the use and the warnings alongside it. Two French chemists, Pelletier and Caventou, isolated colchicine from it in 1820.

Its strangest legacy is agricultural. Colchicine interferes with the spindle that pulls chromosomes apart during cell division, so a treated plant cell can end up with its chromosome number doubled. From the 1930s plant breeders used exactly this to create polyploid crops and ornamentals deliberately — seedless triploid watermelons, larger-flowered and more vigorous garden plants, and fertile hybrids between species that otherwise could not cross. A great deal of twentieth-century plant breeding runs through this one meadow bulb.

In Europe it has a plainer reputation as well: Herbstzeitlose, the meadow plant that farmers watch for, because a hay crop cut with it in remains poisonous to cattle all winter.

Hardy and undemanding across roughly zones 4-8, naturalising into lawns, orchards and rough grass - which is exactly the ground where children, dogs and livestock meet it.

Colchicum is hardy across roughly zones 4-8 and thoroughly undemanding: sun to part shade, ordinary soil that does not stay waterlogged, and no summer water needed while it is dormant. It naturalises comfortably in lawns, orchards, rough grass and old borders, multiplying by corm offsets and by seed.

That easy naturalising is the reason it belongs in this catalog rather than in a border. The habitat it colonises is mown grass and grazed meadow — ground where children play, dogs dig and livestock feed. In its European home it is a recognised problem in hay meadows for exactly this reason.

It weakens in zone 9 and warmer, where it lacks the winter cold it needs and tends to fade after a season or two. If you want a genuine autumn-flowering bulb, the saffron crocus (Crocus sativus) covers the same season in zones 6-9, is a true crocus, and is the plant this one is mistaken for — count three stamens and look for the red threads.