ABSTRACT

Siberian plants differ from European plants in sparsely pubescent or glabrous lustrous stems. In Europe, lower part of stems shaggy-haired, upper part appressed pilose. Some investigators classify the sparsely pubescent plants as a special species M. nemorosa Besser. Apart from the nature of pubescence of stems and leaves (hairs run top downward and not bottom upward as in the type species M. scorpioides); they also differ in the length of style. Both these characteristics are not perceived in the Siberian plants.