Hawthorn (Crataegus oxyacantha)

An English tradition exists whereby it is understood the calendrical celebration of Mayday is not as permitted until the appearance of Hawthorn flowers, such is the magical  importance of this small wizened tree. The flowers have an almost quixotic fragrance which serves as an aphrodisiacal medicine in itself, when the meadows and hillsides come alive in spring. (As an aside, I have been observing the coincidence of Hawthorn blossom with calendrical Mayday for over 20 years, and have noticed an uncanny punctuality to this blossoming nearly every year, notwithstanding the weather). In English folk custom, the Mayqueen maiden of the village wears Hawthorn blossom in her hair.

 

The diversity of growth form has been utilised by humans for centuries: constant pruning and clipping produces dwarf forms which are turned into hedges to contain livestock. Out on the hillsides, single trees stand bent and gnarled, known as “flag trees” and used istorically as way markers. Hedges are maintained by hedgelaying, a purposeful cutting of the trunks which leaves a strip of bark & cambium in tact, and bending over of the tree which encourages vertical shoots to form and makes it stock- proof. In this way, a hawthorn hedge could be kept alive indefinitely, and certainly there are many examples of hedges many hundreds of years old, which only stand a few feet high. As its name implies, Hawthorn carries thorns which “seal the deal” as an aid to enclosure. Getting stabbed by the thorns is a more forgiving experience than its sister tree, Blackthorn (which has an unpleasant toxic effect). .

Hawthorn is therefore a significant tree of the woodland edge, and provides microhabitats and “wildlife corridor” for an unlimited array of wildlife. The destruction of Hawthorn hedges is a matter of grave conservation concern. Apart from the habitat destruction, the functional importance of wildlife corridors results in limited adaptive response of the landscape to change, reducing genetic diversity in isolated populations of plants, fungi, mammals, and insects. 

Finally, the berries of hawthorn, which are a vivid red colour and quite beautiful in autumn, attract overwintering birds to the garden. The berries can also be used as a gentle, safe cardiovascular tonic in herbal medicine. They increase the strength and volume of the heart beat, and do not interfere with any known pharmacological heart medicines. This is much safer than using the alkaloids of foxglove, which have an effective dose which is unnervingly close to the fatal dose.