TG3203 : Leaf galls on alder (Alnus glutinosa)
taken 7 years ago, near to Rockland st Mary, Norfolk, England
Galls are abnormal growths, swellings, pustules or discolourations produced by a plant or other host under the influence of another organism, involving the enlargement and/or proliferation of host cells and the provision of both shelter and food or nutrients for the invading organism. Galls provide a home for the larvae or grubs of certain invertebrates, where they can feed and develop, and each type of gall-producer or causer is specific to a particular kind of plant. Galls come in many shapes including spheres, knobs, lumps, warts or blisters, each being characteristic of the causal organism, and can have a range of colours. Galls can be found on the stems, leaves, flowers, fruits, seeds and roots of plants. Although many varieties of plants can be affected, oaks and willows are particularly rich in galls. Oaks are said to be host to more than 500 different types of galls. Weather, plant susceptibility, and pest populations affect the occurrence of plant galls.
Certain galls are documented to have been used in the production of ink since at least the time of the Roman Empire, and iron gall ink was the main medium used for writing in the Western World from the Middle Ages to the early 20th century. Oak marble galls > Link for instance, were introduced in the early 19th century in an attempt to grow our own supply of galls for making ink. In Chinese medicine, oak galls are used as a remedy called moshizi, which is used for treating dysentery, ulcers and hemorrhoids among other things. Native Americans used poultices of ground gall nuts on sores, cuts and burns. The high content of tannic acid also makes oak galls a good source for tanning and dyeing.
Galls cause little permanent injury and rarely kill the infested plant.
For more detailed information go to the British Plant Gall Society's website at Link
In 2014, the development and management of the Hellington and Rockland St Mary Community Reserve, comprising the eastern end of Hellington Low Common, was taken on by a community trust "for the benefit of the inhabitants and those interested in Hellington and Rockland St Mary, without distinction of gender, sexual orientation, race or political, religious or other opinions". The land is owned by the Parochial Church Council, with the rent being paid from stakeholders' subscriptions.
The reserve is a designated county wildlife site and covers 6.6 acres of ground which is traversed by the Hellington Beck. With the help of local volunteers and supported by the Norfolk Wildlife Trust and the Parish and South Norfolk District Councils, the trust aims to manage the condition of the reserve and to create a healthy environment for diverse species of flora and fauna to flourish, and to educate visitors of all ages, with the objectives of improving the condition of the reserve and providing opportunities to enjoy the countryside.
On the sandy area of grassland to the south of the beck Dove's-foot crane's bill (Geranium molle) > Link , Common spotted orchid (Dactylorhiza fuchsii), Bluebells (Hyacinthoides non-scripta) > Link and Spring beauty (Claytonia perfoliata) > Link can be seen; Common reed (Phragmites australis), Reed canary grass (Phalaris arundinacea), Meadowsweet (Filipendula ulmaria) , Water mint ((Mentha aquatica) > Link and Hemp agrimony (Eupatorium cannabinum) grow on the lower marshy ground north of the beck. Beside the path Lesser celandine (Ficaria verna) > Link , Primrose (Primular vulgaris) > Link and Dog violet (viola riviniana) > Link can be found. Red campion (Silene dioica) > Link , Wild mustard (Sinapis arvensis) > Link and Greater stitchwort (Stellaria holostea) > Link grow on the bank of the beck which is populated by clusters of Watercress ((Nasturtium officinale) > Link. 600 native hedge plants, shrubs and trees have also been planted.