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Common Cow-wheat

©Philip Precey

Common cow-wheat

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Common cow-wheat is a delicate annual that brightens up the edges of acid woodland and heaths with deep golden flowers in the summer.

Enw gwyddonol

Melampyrum pratense

Pryd i'w gweld

May to September

Top facts

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Height: 20-50cm
Common.

Ynghylch

Common cow-wheat is an annual of woodland edges, heaths and upland moors that has deep golden flowers from May to September. It is a hemi-parasitic plant, meaning that it relies on obtaining some of its nutrients from the roots of nearby plants. The nectar of Common Cow-wheat can only be reached by insects that have a long proboscis, especially bees. If the flower is not pollinated, it will pollinate itself. It is the larval foodplant of the rare Heath Fritillary butterfly.

What to look for

The leaves of Common cow-wheat are narrow and pointed. It has yellow flowers that grow in pairs up the square stem, both facing the same direction; the first pair to emerge are those at the top of the stem.

Where to find

Widespread, but scarcer in the east.

Roeddech chi yn gwybod?

Common cow-wheat has a mutually beneficial relationship with the Wood Ant. The flowers produce a sugary liquid from tiny glands below the petals that the ants are attracted to and feed on. The seeds of the plant are very similar in appearance to the cocoons of the ant and are transported back to the nest where they can grow.