seed case

Horse chestnut Aesculus hippocastanum conkers both in, and out of, their seed case

Sweet chestnut Castanea sativa pen and ink illustration with watercolour wash.  Illustration shows detail of blossom, an opened spiny seed case, and a and lone chestnut.

Sweet chestnut Castanea sativa pen and ink line drawing with details of nut and prickly seed case

Sweet chestnut Castanea sativa sketchbook study with colour details of an individual chestnut,  seed case, and leaf

Horse Chestnut Aesculus hippocastanum twig and conker with fruit peeping out from the spiky seed cover

Horse Chestnut Aesculus hippocastanum flowering spike or candle

Germinating seed from a grain through six stages to show how the cotelydon leaves emerge and the roots grow