BIOMORPHOLOGICAL CHARACTERISTIC OF LEMNA L.GENUS OF LEMNACEAE. GREY. FAMILY IN INTRODUCTION CONDITIONS

Abstract

The results of the research of biomorphological characteristic of Lemna L. of
Lemnaceae. Grey. family of the collection O. V. Fomin Botanical garden are shown.
The family is presented by 3 genera (Lemna L., Spirodela Schleid.,
Wolffia Horkel ex Schleid.) and 6 species. Genus Lemna L.contains 4 species. The
comparative characteristic of the main features of the introduced representatives of
Lemna genus was carried out. For the first time phenospectres has been presented,
where the longest, medium and shortest seasonal vegetative development of each
species are noted.Their taxonomical diversity, ecobiomorphological features,
geographycal distribution, conditions, methods of the inroduction and practical use
are observed.
It is shown that according to the results of the study of bioecological
characteristics of the family Lemnaceae, Lemna genus in the collection of the
Botanical Garden named after. acad. O. V. Fomin has 4 species. The taxonomy of
genera, geographic distribution, life form, biomorphological peculiarities in the
conditions of introduction, methods of care, reproduction and practical use are given.
For the given systems the family belongs to the class Monocotyledones, Arales order.
By its biomorphological characteristic it is perennial, grassy, aquatic plants. All of
them have floating on the surface or in the water of the leaf, in L. turionifera they are
papillomas and form, in September, turions. The comparative table of the
characteristics of the main features of the introduced species is presented: form,
length (mm), leaf coloring, number of veins, presence of anthocyanins and the
formation of turions. For the first time, eight phenosperms of seasonal vegetative
development of introduced species are presented. It is proved in the article that
cultivation methods in protected and open ground contribute to the maintenance of
tropical and subtropical species of the genus, for which, in our conditions, we use
limiting, floating plastic foam plastic and immersed, plastic, transparent, containers.
Key words: Lemna, distribution, biomorphology, introduction.