Czernyadjeva,
I.V. & E.A.
Ignatova. 2018. On the genus Haplohymenium
(Anomodontaceae, Bryophyta)
in
Arctoa (2019) 28: 105–117
doi: 10.15298/arctoa.28.09
The genus Haplohymenium
in Russia is represented by four species, including H. sieboldii, reported for the first time for the country,
in southern regions of Primorsky Territory and Transbaikalia. This species is very closely related to H.
triste and their distinction is discussed in
detail. Haplohymenium longinerve
is usually described as an easlily recognizable
species due to unipapillose laminal
cells, whereas in all other species the cells are multipapillose.
However the variation in papillosity is drastic in
this species. Different expressions of pseudounipapillose
pattern of Haplohymenium longinerve are illustrated with different microscopy
techniques, revealing a quite delicate structure of large conic papillae,
making this character applicable with caution.