Three corner leek. From pest to pesto

Three corner leek pesto – A quick and tasty recipe from a highly invasive non native plant.

Three corner leek (Allium triquetrum) Liliaceae

Invasive plants evoke heated feelings. Certain plants, whether we appreciate it or not, are evolutionarily disposed to the rapid colonisation of land, especially bare soils. When wandering the British countryside, you will notice that some of the flora found here can be aggressive colonisers of ground.

So if the plant is edible and tasty, its a no-brainer right? Surely we eat em to beat em?!

The 3-corner leek is native to the Mediterranean area. First introduced to cultivation here in 1759, it was found well established in the wild less than a century later. With a late autumn to spring growth cycle, the plant found a profitable niche here, and when coupled with a handy seed disposal relationship with ants, it gives the plant an advantage when establishing in new sites.

The plant will be found in a number of lowland settings in the UK, particularly loving life in our moist South West counties such as Devon and Cornwall, and commonly appears throughout Southern England except around Salisbury Plain.

Scattered populations are increasingly recorded in town and country throughout the UK.

The abundant winter foliage and copious spring flowers are increasingly found in urban areas

Large dense carpets of this bulbous perennial are not uncommon. With salt-tolerance, it also enjoys various coastal settings up and down the isles.

It re-appears when most of our herbaceous plants are either dormant or overwintering. Keep an eye out in October and you will see quite a bit of new growth rising from their small white bulbs, which are often right at the surface of the soil.

How to identify three corner leek

Each bulb typically produces 4 or 5 strongly keeled, glossy-green leaves with parallel veins, entire margins, and leaf tips that are often acutely pointed. When looking underneath, the mid-vein is prominently ridged.

Toward the base, its hairless leaves are distinctly triangular in structure. If chancing upon a large stand of the plants, you will find the foliage tends to drift in the same direction, creating a pleasing long-grass sward effect.

3 corner leek is invasive and will make dense swards
3 corner leek spreads rapidly and can quickly take on the appearance of a lushious dense grass sward.

If you crush a leaf, the unmistakeable, sulphurous Allium chemistry will quickly be detected. You might well find that the strength and quality of the aromatics differ dependent on soils and temperature…at least the strongest and most pungent stuff I have foraged, came on cold January days from acid soil in Devon and on Barnes common, SW London.

Flowering occurs during April and May, like a number of our native ephemeral Allium species. The distinctive triangular flower stem will grow to around 45 cm, eventually producing a drooping, delicate, bell-shaped inflorescence. 

The white sepals and petals have thin green vertical stripes, making these flowers easily identifiable from similar-looking plants white bluebell cultivars (Hyancinthoides non scripta ‘Alba’), or the summer snowflake ( Leucojum aestivum) .

The green striped corolla of three corner leek

The corolla displays typical lily family patterns of three stamens and a fused, three-lobed stigma can be seen. Seeds are similarly produced in groups of threes, initially green coloured, then finishing black.

This larger than life shot shows the remains of the petals surrounding the seed pod. Young green seed pods are similar in size to petit pois peas
Dried seed pods eventually open to reveal three black seeds
Summer snowflake appears with blunter leaf tips and without the pronounced keel undersides. The corolla is tighter, without stripes, and with a yellow center

Foragers might say that they can know an Allium from its smell. You cannot rely on this diagnostic characteristic when harvesting large amounts.

The nature of essential oils means we inevitably transfer them onto our fingers, so how do we know that we are not accidentally picking poisonous daffodils, snowdrops, or crocus, growing amongst them?

You need to know the leaf structure, the colour, the texture, and other aesthetic and mechanic qualities that can only come from engaging with the plant.

With very similar-looking plants, close study of numerous features becomes vital, especially when the plant is young. Our brains can quickly file this range of information presented to them, merging it with observations about the landscape, soil, habitat, micro-climate, and time of year; while observing the habit of the plant itself.

So, knowing the blue green colour and blunt-tips of daffodil leaves, and the length and width of crocus or snowdrop leaves compared to this particular garlic relative, helps to ensure that even on auto-pilot, and working at speed, the key check points are covered when harvesting.

I work with the premise that I also get two further opportunities to check the leaves; firstly during preparation of the plant, and finally, on the chopping board, or as I add to the pot.

Using 3 corner leeks

All Alliums and all their parts are edible. 3-corner leek, with its luscious leaves tender stems and crunchy flower buds and bulbs, is particularly versatile. If you can eat all parts of the plant, it’s in season all year – what more could you want!? With a strong onion-leek flavour, this plant can be added to many dishes.

Three corner leek pesto, with soaked sunflower seeds, 2 cloves bulb garlic, olive oil, lemon juice, basil, salt, pepper. Photo: Tobias Snow. View more on Instagram.

I harvest leaves throughout winter, from November onwards; to add to sauces, salads, pies, pesto and soups, then harvest the first of the sweet, pungent flower buds for lacto-fermentation in March. 

Bunches of pre-flowering stem ‘leeks’ can also be harvested in late March and April, before the flowers eventually open. These can be used in salads or as garnish. The young, green, and crunchy seeds can be eaten raw, fermented, or dried.

From late May onwards, as the plant enters its dormancy, I harvest the small marble-sized bulbs for preserving. Juicy and crunchy, these are quite fiddly and time consuming to prepare, but are simply stunning when lacto-fermented for a couple of weeks!

Medicinally, we could potentially use 3 corner leek like a milder version of garlic, but I always reach for bulb garlic out of instinct – often carrying a clove – so don’t employ the other species for medicine. The Allium essential oils are known to be antimicrobial, anti-fungal, anti-viral, and antiseptic, so this plant will likely show some activity in these areas.

This delicious plant is one of the featured species in my foragers playing cards, and the ‘top trumps’ style card game. You can find these in the foraging resources shop. 

Happy foraging!

 

Garlic and wild garlic

Wild garlic, Bulb garlic

Allium ursinum, Allium sativum

Liliacea family

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Only comparatively recently have the British public embraced garlic, a plant renowned globally for its culinary uses.
Before the 1980’s it wasn’t used anything like it is today.

In this discussion I deal with the similar culinary and medicinal aspects of both our native wild garlic (A.ursinum), commonly known as ‘ramsons’, and the better known medicinal food, bulb-garlic (A.sativum).

Although you won’t come across the bulb-garlic in the wild in Britain, it can be easily grown and acquired most everywhere, and is truly medicinal food, so, warrants inclusion in any discussion on the medicinal prowess of Alliums.

If you are yet to discover the carpets of wild garlic in British woodlands in early spring or to grow any in your garden, where have you been? In any case, you will want to soon after reading this!

The garlic’s are some of the many thousands of lilly family members, grouped together in a large genus comprising no fewer than 700 species of bulbous and rhizomous biennials and perennials.

They are native to the northern hemisphere, and are believed to have originated in Asia. Bulb garlic is certainly one of the most ancient of medicinal herbs, documented in Babylonian times (c.3000 BC), and found in the tomb of Tutankhamun (c.1370-52 BC).

Botanical description to help identify garlic

Both the bulb-garlic and its wild version are naturally biennial, taking two years to complete their life cycle. Bulb garlic is usually propagated from the individual cloves of the bulbs and grown over one ‘season’. In this respect, we grow bulb garlic as an annual crop in the garden.

Bulb garlic’s leaves are thin lanceolate blades, of a dark green hue, although not as large as their relative, the leek (Allium porum), which has a blue-green look to the foliage. Unlike the onion (A.cepa), bulb-garlic’s leaves are not cylindrical or hollow.

All Allium leaves have parallel veins on either side of the mid-rib, ad-pressed somewhat and creating a creased-blade effect. Bulb garlic can grow up to 45 cm high, although during flowering, the terminal spike can reach up to 75 cm.

The wild garlic is a similarly pungent plant to the cultivated bulb-garlic, but looks very different in appearance. It begins to poke out its leaves from small underground bulbs during the first, warmer and longer days of January.

In some shady areas the large succulent leaf stalks on ramsons will be up to 25 cm in length, even before broadening out into their lanceolate leaf shape. The actual blade is approximately 6-7 cm wide and commonly around 25 cm long.

Care should be taken before harvesting that you have identified the plant correctly, as wild garlic has a couple of similar looking plants.

As with all edible wild plants, we get at least three opportunities to ensure we have the right plant. First is the point of harvesting, second is during preparation of the material, and third is before adding to the pot or pan.

Make sure you aren’t harvesting the poisonous look-a-likes known as lords and ladies (Arum maculatum), or Lily-of-the-valley. The former is far more common than the latter. Both can be found in woodland habitats.

Lords and ladies will grow amongst wild garlic, but has arrow shaped leaves with two rounded lobes at the base of the leaf, as well as having a net-veined leaf pattern, which helps easily distinguish it from ramsons when looking closely. Knowing and observing this will save you from disaster if soley listening to that often heard advice about “…if it smells like garlic, it is garlic”.

Anyone who has handled ramsons, will know that the garlic smell will easily transfer onto your fingers ,and therefore it is possible to hold a leaf of lords and ladies to your nose and smell garlic! Far better to learn how to identify each plant!

Lily-of-the-valley on the other hand, has leaves that are pretty much the same shape as wild garlic, although without the long, alost transparent leaf stalk, or the clump habit that ramsons does, plus it has a very different inflorescence. I’ve not actually come across ramsons and lily-of-the-valley together, but that’s not to say I won’t tomorrow!

Ramsons is indicative of ancient woodland, and easily found throughout March and April where it often creates extensive carpets, at least it does in woodland in the more western and southern areas of Britain. It can be found at altitudes up to 450 metres.

Ramsons is an ephemeral bulb, flowering before the woodland canopy trees are fully open in spring. Typically their flowers open and set seed from April through May, with seeds maturing late June to July. Its dormancy period is during our summer time and this is the best time to harvest the underground bulbs. These are relatively small, coloured a light creamy-white, approximately 5 cm long and 1 cm wide.

The flowers are a creamy-white colour, sat on solitary, terminal stems. The small, star-like individual flowers are borne into an overall spherical shape. The unripe green seeds swell in late spring. These are excellent eaten green and raw, being fleshy, crunchy, and exuding garlic aromas and tastes.

Parts used….. Raw cloves are best, as they maintain all the medicinal potency which otherwise rapidly diminishes with cooking. For medicinal use, the advice will always be to use raw cloves. Leaves of wild garlic can be picked as soon as found in the early spring.

Harvest….. Bulb-garlic: When leaves turn yellow around mid-late July, dependent on region. Wild garlic: leaves; Feb-April. Flower buds; March-April. Flowers: March-May. Green seeds; April-may. Black seeds; May-June. Bulbs; June-December

Key constituents.…. Garlic cloves: Volatile oil (containing alliin, which after crushing or chewing is enzymatically converted to alliciin, one of the major active components of garlic); germanium; selenium; saponins; mucilage; amino acids.

Actions…… Anti-bacterial, anti-septic, anti-fungal, anti-viral, expectorant (due in part to the mucilage), anti-platelet, anthelmintic, hypo-lipidaemic, vaso-dilatory.

Pharmacology and uses of garlic….. Much of the pharmacological activity of this plant stems from the many acrid, volatile sulphurous compounds. They are known to inhibit cholesterol synthesis as well as fatty acid and triglyceride synthesis.

Therefore, regular use leads to less chance of fatty deposits on artery walls, and with it, less chance to develop the serious condition – atherosclerosis.

Anti-oxidant effects have been shown in animals (in vivo) and the test tube (in vitro). Garlic enhances the activity of free radical scavenging enzymes such as superoxide dismutase, whilst protecting lipo-proteins from oxidation. Both these factors point to its use in treating conditions such as atherosclerosis.

Bulb garlic is known as ‘lashuna’ in ayervedic medicine, being used for whooping cough, heart trouble, flatulence, dyspepsia and colic.
Immuno-stimulatory actions have been recorded for high-molecular weight proteins extracted from Garlic.

These reportedly stimulate the activity and production of some of our immune system defence cells known as macrophages, lymphocytes, and natural killer cells.

Another long-standing and well documented traditional use of garlic is as an expectorant, to help clear coughs and colds. The saponins are almost always linked to this effect.

Garlic is also used in dietary control of diabetes and hypoglycaemia because of the resultant improvement in pancreatic abilities to produce insulin.

Ramsons also contain alliciin, so will therefore be anti-septic, anti-bacterial, anti-fungal, and anti-inflammatory, just somewhat milder so. Throughout the countryside in southern parts of Britain and Ireland, wild garlic has been noted as good at defeating coughs, colds and other ailments.

“Nine diseases shiver before the garlic”, was a saying in Sligo, Ireland, only 100 years ago. This points to the faith people placed in the herb to ward off many illnesses. This belief may have been reinforced during the 1918 global flu pandemic, when people carried around a clove in their pocket for protection. Garlic kills vampires remember!

Alliums thin the blood and will interact with aspirin, and could increase bleeding, as well as interacting with HIV drugs such as protease inhibitors. It also interacts with ‘warfarin’, and may potentiate the drug as well as increasing the chances of internal bleeding. More than 5 grams of garlic per day when taking warfarin can reportedly lead to problems.

The fiery nature of garlic brings with it some contra-indications for use. Namely, conditions of chronic or acute stomach inflammation, and low thyroid activity.

The compound allicin is responsible for many effects as well as the much documented anti-microbial effects. Many harmful micro-organisms are destroyed by Garlics, including Staphylococcus aureus, Escherichia coli, Proteus and Salmonella spp.

The bulb is a very useful source of selenium, This particular element can assist the body in cleansing itself of toxic heavy metals, as well as protecting the cardio-vascular system in a numbe of ways.

As a food, wild garlic lends itself very well to a pesto, in place of bulb garlic. It also goes well in white sauces with fish, and as a salad leaf, chopped as you would chives.

Raw wild garlic can add an extra healthy punch to the salad bowl. To reduce the strong flavour, just blanch slightly, or steam for a minute or two.

The leaves, leaf stalks, flower stems, flower buds, green seeds, and bulbs, can all be preserved by lacto-fermentation (my favourite method of preserving food, using salt and water) and I rate these plant parts really highly when treated this way.

The bulbs will stink when preserved as a ferment, but after a few months their flavour mellows to something similar to roast garlic.

The flowers make an interesting garnish, especially if dried, when their flavour takes on something akin to cheese and onion crisps!

I have yet to make a dried garlic seed / peppercorn mix, but nevertheless, ideas such as this encapsulate the beauty of finding your own food plants and playing with different parts of plants we already know. Through these experiments, we can rediscover ancient flavours of the countryside by creating new recipes or adapting old ones.

More could be written, and more will be discovered, if you trawl the web. These medicinal food plants are quite simply, super!