First report of white rot of wood sumac in the Botanical Garden-Institute FEB RAS caused by Schizophyllum commune

White rot of staghorn sumac (Rhus typhina f. laciniata) wood in the collection of Botanical Garden-Institute FEB RAS caused by Schizophyllum commune is discussed.

New records of a rare and protected Bryocaulon pseudosatoanum in the south of the Russian Far East

New localities of the lichen species from the Red Data Book of Russia Bryocaulon pseudosatoanum are reported in the south of the Russian Far East, including in a number of remote areas (Urup, Iturup, Kunashir and Shikotan Islands). Differences from closely related species, ecology, range of the species and differences from similar species are discussed.

The experience of Magnolia acuminata cultivation in the Botanical Garden-Institute FEB RAS (Vladivostok)

This report presents the results of the initial stage of Magnolia acuminata introduction at the Botanical Garden-Institute of the Far Eastern Branch of the Russian Academy of Sciences (Vladivostok). In the conditions of the southern part of Primorskiy Kray, M. acuminata has shown sufficient winter hardiness, habitus retention, high shoot-forming ability, bloom ability. In this regard, our recommendation is to include M. acuminata in the range of ornamental tree used for landscaping and to spread its introduction tests in the Primorskiy Kray.

Review of the taxonomic composition of the family Dryopteridaceae in the pteridoflora of the Russian Far East

The taxonomic composition of the Polypodiophyta of the Russian Far East was processed more than 30 years ago. There was a need to revise the taxonomic composition of this group of plants, the systematic position of its representative species, taking into account recent research. The taxonomic composition of the Dryopteridaceae family was specified. Dryopteridaceae is the largest family of Polypodiophyta in the flora of Russia and the Russian Far East. It showed that in the Russian Far East, the family is represented by 4 genera and 17 species.

Genus Elaeagnus (Elaeagnaceae) in the south of the Russian Far East

The spread of two species of oleaster – Elaeagnus angustifolia and E. multiflora, cultivated and wild in the south of the Far East of Russia, has been clarified. Their invasive potential is assessed. Only a single case of invasion of E. multiflora into natural plant communities in vicinity of the Nevelsk in southern Sakhalin has been identified. Previously, this species was known only in culture or as wild in places of former culture in the southwest of Sakhalin and Kunashir Island (southern Kuril Islands).

In vitro propagation of plume cultivars selected in Amur Region, Russia

Results are presented on clonal micropropagation for three cultivars selected in Amur Region: 'Blagoveshchenskii chernosliv', 'Lyudmila', and 'Oranzhevaya rannyaya'. Tips of growing young shoots are preferable explants for the tissue culture production as compared to lateral buds of the same shoots. The Quoirin-Lepoivre (QL) agar medium supplemented with sorbitol (20 g/L) and 6-benzylaminopurine (BA, 3 mg/L) was used for the establishment of explants and tissue culture initiation. Shoot proliferation was conducted on a QL agar medium with a modified microelement and vitamin composition and supplemented with sucrose (30 g/L), BA (0.2, 0.5, or 2.0 mg/L) and indole-3-butyric acid (IBA, 0.04 mg/L). Optimal shoot proliferation was noted to be achieved by alternate cultivation cycles on the medium with various BA concentration: 2 mg/L for an increased proliferation rate and 0.2–0.5 mg/L for an increased microshoot length. Higher values of shoot proliferation (the proliferation rate and microshoot length) were found for cv. 'Blagoveshchenskij chernosliv' (1.6 and 1.9 respectively) as compared to cv. 'Lyudmila' (1.3 and 1.5) and cv. 'Oranzhevaya rannyaya' (1.4 and 1.2). In vitro rooting was achieved after a preliminary incubation of microshoots in the aqueous solution of IBA (15 mg/L) with the subsequent cultivation on the growth regulator-­free QL agar medium. The cultivar 'Blagoveshchenskij chernosliv' had higher values of rooting (5.8 roots per shoot and 11.6 cm of total root length) as compared to cv. 'Lyudmila' (4.6 and 6.6 respectively) and cv. 'Oranzhevaya rannyaya' (5.3 and 7.4). The protocol was used for production of own­rooted plants of the plum cultivars.

Analysis of the collection of the genus Iris (Iridaceae) in the Botanical Garden-Institute FEB RAS (Vladivostok, Russia)

The article provides brief information about the history of the introduction of representatives of the genus Iris, analyzes the composition of the introduced varieties included in the modern collection in the BGI FEB RAS, and which are at various stages of the introduction study. The current volume of the collection is 188 species andvarieties, of which 88 varieties are included in the I. hybrida hort. group, 30 varieties in Siberia, 33 varieties in the Japanese group, 15 varieties in the Species Hybrid group and 22 species and forms of local and foreign flora.

New locality record of Cypripedium guttatum (Orchidaceae) in Sakhalin Island

A new locality of Cypripedium guttatum was discovered near the right-of-way zone of the oil-gas pipeline in the Makarovskiy District, south of Sakhalin Island (48.2248° N, 142.5470° E). We guess, that propagules of plants were dispersal from the nearest localityon Zhdanko Ridge, 10 km south. Over the 5 years since the first record of C. guttatum in 2016, the subpopulations increased almost 10 times, which indicates the successful introduction into the plant community.

Preliminary results of the variety study of intersectional peony hybrids in the Botanical Garden-Institute FEB RAS (Vladivostok)

The article presents preliminary results of studying the characteristics of growth and development of introduced varieties of the intersectional group of peonies in the collection of the Botanical Garden-Institute of the Far Eastern Branch of the Russian Academy of Sciences. It was revealed that all varieties belong to the long-growing spring-summer-autumn-green phenorhythm type with a stable preservation of the decorativeness of the leaves in the late summer period. It has been established that varieties of Ito-hybrids develop normally under monsoon climate and go through all phenological phases; the duration of the growing season of plants is 194–206 days.

Addition to the pteridoflora of special protected natural territory of the Botanical Garden-Institute FEB RAS

Six fern species were identified as the results of field flora studies, analysis of herbarium and literature data for the special protected natural territory of the Botanical Garden-Institute FEB RAS. Athyrium monomachii, A. yokoscense, Cystopteris fragilis, Dryopteris expansa, Polystichum braunii, Woodsia subcordata complete the fern check list.