Alexandr Alexandrovich Elenkin and botanist Alexandr Fedorovich Flerow, Fedtschenko started a new independent journal called Journal Russe de Botanique (Русскій ботаническiй журналъ). It published issues eight times a year, until 1915 when World War 1 started and financial cutbacks had to be made. Between 1908 and 1910, Fedtschenko and Flerow published Flora Evropejskoj Rossii (Flora of the European Part of Russia), which contained 3,542 new species. This large piece of work also had contributions from other botanists. In 1907, 1908 and 1910, they also published the three-part volume Okskaya Flora (Flora of the Oka). After they published the Flora volumes, they were criticized by several botanists including, F.S. Nenyukov, N.I. Kusnezov and Eduard Regel, due to its very short descriptions. But this made the books very compact and portable, and therefore very widely used. In 1910 and 1915, Boris and his mother (now aged 70), returned to Turkestan for more plant hunting expeditions. In 1930, he attended the Fifth International Botanical Congress held at the Imperial Institute, in London. He attended the International Congress of Tropical Agriculture and Colonial Development (discussing cotton in Egypt). Boris collaborated with many institutions, including Berlin Botanical Garden and Botanical Garden of Geneva. Also in 1930, Fedtschenko started organising botanists around Russia to survey plants and report their findings to create a national plant survey. In 1931, the Imperial Botanic Garden and Imperial Botanical Museum were merged to create the Komarov Botanical Institute. Vladimir Komarov was head of the museum and, as such, outranked Fedtschenko. He then took over responsibility for the Flora SSSR project and became its editor-in-chief. Eventually the thirty-volume project was completed and published in 1964, after Fedtschenko had died in 1947. The volumes covered some 17,500 plant species, and represented a huge step forwards for Russian botany. Boris Fedtschenko died on 29 September 1947 in Leningrad (now called St Petersburg). The specific epithet fedtschenkoi honors botanist Boris Fedtschenko. The epithet fedtschenkoanus also refers to him, but fedtschenkoi refers to his father's and mother's work. Significant other works of the 1900s include: by Olga Fedtschenko and B. Fedtschenko (1906-1916) (1907) by B. Fedtschenko (1908-1910) by B. Fedtschenko and Alexandr F. Flerow (1912-1924) by B. Fedtschenko and Alexandr F. Flerow (1927-1936, index in 1938) by B. Fedtschenko and Boris K. Schischkin He is the botanical author of many species of plant and tree, including Abies sibirica var. semenovii (1899), Echinops tschimganicus(1911), Gypsophila bucharica(1911),