The epidermis of nuxvomica consists of strongly thickened pitted and lignified trichomes.Epidermis is followed by a layer of collapsed cells. Endosper has thick walled polyhedral unlignified cells with plasmoderma, aleuron grains and oil globules. REF:PHARMACOGNOSY-NEERALI PRAKASHAN PUBLICATIONS.34TH EDITION, Page-463

The seed-coat is very thin and consists of a narrow layer of brown, collapsed parenchyma covered with an epidermis, the cells of which have developed into hairs. These are bent near the base and thus lie close to the surface of the seed. The base is thick-walled and marked with oblique pits; above it passes into a tubular hair bearing longitudinal rod-like thickenings. The endosperm consists of large cells with very thick walls which swell in boiling water or in solution of potassium hydroxide. These cells contain the alkaloids.