Common Name:

General Information

Melilotus macrocarpus is an annual plant with much-branched ascending to somewhat spreading stems; it can grow 25 - 40cm tall.
The plant is cultivated in Algeria for its mature seedpods, which are used as a spice[].

Known Hazards

The plant contains coumarin, a substance produced by the plant because it acts as an appetite suppressant and gives some protection from grazing - it is also the compound that gives some dried plants the smell of new mown hay. Coumarin is found naturally in many fruits, including strawberries, black currants, apricots, and cherries; it also has some medicinal applications, though it is also known to be toxic, affecting especially the liver and kidneys. Coumarin is of relatively low toxicity to humans – indeed it has often been used as a flavouring and aromatic additive in foods and other commodities. However, it can be much more toxic to other species, especially rodents and specifically rats.
The fresh plant material, consumed in moderation, is generally safe. However, the dried plant material, especially if it is not dried properly and is invaded by fungi, is potentially much more toxic as the coumarin breaks down to form other compounds that can have a strongly anticoagulant effect upon the blood. Warfarin, a well-known anticoagulant drug and rat poison, is one of those compounds produced from coumarin.

Botanical References

Range

N. Africa - Algeria, Tunisia

Habitat

Not known

Properties

Edibility Rating
Habit	Annual
Height	0.30 m
Pollinators	Bees, Insects
Cultivation Status	Cultivated, Wild

Cultivation Details

Melilotus species require a sunny position. They can succeed in a range of soil types, so long as they are well-drained, often being found where the soil pH is somewhat alkaline and generally disliking acid conditions.
This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[].

Edible Uses

The seedpods are used as a spice[]. They have a strong aroma of freshly mown hay.

Medicinal

None known

Other Uses

None known

Propagation

Seed - sow spring to mid-summer in situ[]. Pre-soaking the seed for 12 hours in warm water will speed up the germination process, particularly in dry weather[]. Germination will usually take place within 2 weeks.