Abstract
To clarify life form, ontogeny and features shoot formation of individuals Stachys annua and Clinopodium acinos were studied. It was found that the duration ontogeny of species is determined by rate of development shoot of an individual. It was found that both species bloom in the first year, however, individuals of S. annua, having reached their maximum growth, completely die off at the end of the first growing season. Accelerated development of S. annua individuals leads to the formation of powerful synflorescence and inhibition development unrealized buds of basal part shoot. In contrast to S. annua, ontogeny of C. acinos individuals is long (5–6 years). The slowed down development rate of the C. acinos shoot leads formation of a weak generative sphere and development of innovation zone consisting of 1–2 metameres with functionally developed naked buds. The performed biomorphological analysis allows us to classify S. annua as typical annual monocarpic, C. acinos as oligocarpic, belonging to the sensu lato short-lived plants group.
Highlights
To clarify life form, ontogeny and features shoot formation of individuals Stachys annua and Clinopodium acinos were studied
The comparative ecological and morphological method in the plant studies allows us to establish their life form, which serves as the basis for solving various problems in botany and ecology
The structural and morphological analysis of the biomorph, including the assessment of the vegetative–generative sphere and the peculiarities of shoot formation, which determine the multiplicity of fruiting in short-lived plants, makes it possible for researchers to reasonably classify them in the appropriate group
Summary
To clarify life form, ontogeny and features shoot formation of individuals Stachys annua and Clinopodium acinos were studied. S. annua is a singleshoot plants, two shoots rarely develop with early death apical bud of main shoot. The aboveground part of C. acinos is represented by one or more elongated shoots branched up to second order.
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