Abstract
Two localities for <em>Huperzia selago </em>subsp. <em>arctica </em>are recorded from Lithuania, to the south of its known distribution area. The habitats of this subspecies are cutover peatlands whose natural vegetation was disturbed 6-8 years ago during peat exploitation. One of the dominant species of latest vegetation cover is the invasive bryophyte <em>Campylopus introflexus</em>. Characteristics of the habitats of <em>H. selago </em>subsp. <em>arctica </em>and the frequency of this taxon in populations were analysed.
Highlights
The species Huperzia selago Bernh. s.l. comprises an assemblage of morphologically diverse plants [1]
A feature of this subregion is that the sum of active temperatures (ΣT > 10°C) is 21002200°C, the mean absolute minimum temperatures are −24 to −26°C, it has an annual precipitation of 500-600 mm and displays a Selyaninov’s hydrothermal coefficient (HTC) of
The localities presented here, and for which this subspecies has been recorded, lie to the south of its main distribution area, which covers both arctic and boreal zones. These localities are subject to climatic conditions different from those of the main distribution area, since Lithuania extends into the temperate zone and is subject to a climate intermediate between West European maritime and East European continental types [28]
Summary
The species Huperzia selago Bernh. s.l. comprises an assemblage of morphologically diverse plants [1]. S.l. comprises an assemblage of morphologically diverse plants [1] Those from high- and mid-alpine habitats are low-growing and compact, yellow-green and have appressed leaves. Southern lowland plants are larger, very dark green, have more or less patent leaves, and bulbils are sparse or absent [2]. Such variation is treated differently by European botanists. Russian authors have applied for some taxa to be elevated to the rank of species, e.g. H_selago, H
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