Aesculus hippocastanum f. memingeri is a cultivar of the Aesculus hippocastanum, commonly known as the horse chestnut tree. It is named after Wilhelm Meminger, a German horticulturist who discovered and propagated this cultivar in the 19th century.
This cultivar is known for its distinctive leaves, which are deeply cut into seven to nine narrow lobes. The leaves are also slightly darker than those of the typical Aesculus hippocastanum. It produces white or pinkish flowers in the spring, which are arranged in large panicles. The tree also produces large, spiky fruits that contain shiny, dark-brown seeds known as "conkers."
Aesculus hippocastanum f. memingeri is commonly used as an ornamental tree in parks and gardens. It is also used for its medicinal properties, as the seeds contain aescin, a compound that is used to treat various conditions such as varicose veins and edema. However, it should be noted that the seeds are toxic if ingested in large quantities.
Overall, Aesculus hippocastanum f. memingeri is a unique and attractive cultivar of the horse chestnut tree that is valued for its ornamental and medicinal properties.