Two species
of Jungermanniaceae are described as new to science. Solenostoma
pseudopyriflorum Bakalin et Vilnet is characterized by paroicous
inflorescence, rigid shoots, purple colouration of a stem and leaf bases, as
well as rhizogenous basal portion of the perianth. The species is most closely
related to S. pyriflorum, but the latter has dioicous inflorescense and
not so deep purple colour of a stem and basal portion of leaves. Jungermannia konstantinovae Bakalin et Vilnet is
characterized by penta-plicate perianth, paroicous inflorescence, very oblique
inserted leaves and prostrate growth form. The species is superficially most
similar to J. atrovirens, but the latter species is dioicous and has a
typical for Jungermannia fusiform perianth, that is gradually contracted
to the mouth. Solenostoma pyriflorum is excluded from Russian flora, as
all so-called collections belong to S. pseudopyriflorum. Also, S.
rishiriense is excluded from the liverwort flora of Primorskij Territory
and Sakhalin Island, as all collections from these regions were proved to be S.
pseudopyriflorum as well. Solenostoma pocsii (Váňa)
Bakalin comb. nov. is proposed