On symmetric λ-configurations with small λ

Abstract

In this paper, we focus on the existence of symmetric λ-configurations with λ = 2, 3, and 4. Three new spatial configurations (v 8 ) 2 for v = 30, 31, and 32 are constructed. The existence of a spatial configuration (v k ) 2 are updated for k 10. The existence tables for symmetric λ-configurations for λ = 3, 4, and small k are also given.

Fabronia rostrata — a new species for the moss flora of Russia

“…and F. pusilla Raddi, restricted to the south-west part of the country (Ignatov, Afonina, Ignatova et al, 2006). The species diversity of the genus increases southward in Asia, and reaches ten species in China, three of which were recently published and four considered as endemics of the country (Gao & Fu, 2002).…”

“…Scale bars: 2 mm for 1-3, 6; 1 mm for 4, 7; 0.5 mm for 10-11; 100 μm for 5, 8-9. Though Gao & Fu (2002) describe sexual condition of F. rostrata as dioicous, Brotherus (1929) in the original description of the species indicates that it is monoicous. Plants with both anteridia and archegonia were observed in collections from Russia.…”

“…Fabronia rostrata was originally collected in NW Yunnan, at 2325 m a.s.l., on granite rocks in a dry oxbow of Mekong River (Brotherus, 1929). Gao & Fu (2002) report the species from another locality in Yunnan and from Henan, describing its habitats as "rocks and tree trunks in forests". In Zabaikalsky Territory the species grew at low elevation, up to 650 m a.s.l., on rock outcrops; in Amurskaya Province…”