The results of the study of the early stages of ontogenesis of Orthosiphon aristatus (Blume) Miq. under the conditions of introduction on the Southern Coast of the Crimea are presented. Morpho-biological peculiarities of seeds of the species are revealed. It was found that the color of sepals of mature seeds of O. aristatus is usually yellowish green, while the color of the seeds themselves becomes brown. Morphometric parameters of these seeds, such as length and width, have a very low level of variability (not exceeding 8%). On average, seed length is 2.00 mm and width are 1.40 mm. Physiologically mature O. aristatus seeds take about 14 days to germinate successfully. If the seeds retain their density when tested for viability, they will be covered with a layer of mucus of varying thickness when they germinate. The species is characterized by the above-ground type of seed germination, with the formation of a complete sprout clearly distinguishable by primary roots, stems, and seedpods.