[Presence of nuclear invaginations in the cells of some floral nectaries and hydathodes].

Although nectaries and hydathodes differ in many anatomical and physiological aspects, they have some identical features. The purpose of this paper is to expose such features in the nuclear morphology. Special attention is devoted to invaginations containing cytoplasm. Many organelles are found in the cytoplasmic pockets; among them, mitochondria and plasts appear frequently deeply enclosed by the nuclear membrane.It is postulated that the form of these nuclei is related to the process of secretion and guttation.