Abstract
On the steppe slopes in the Yenisey River Basin in the vicinity of the City of Krasnoyarsk a new cleistocarpous species of the genus Pterygoneurum was found. The new species Pterygoneurum sibiricum is characterized by sessile cleistocarpous capsule, short triangular-cucullate calyptrae, and leaves loosely appressed and somewhat slightly twisted when dry, as well as papillose leaves and lamellae. It differs from all stegocarpous species of Pterygoneurum in a cleistocarpous capsule. It also differs from the cleistocarpous Pterygoneurum kozlovii in having high lamellae of 4–10(15) rows of cells in height (vs. low lamellae of 1–4 rows of cells in height in P. kozlovii); papillae of lamellae located on both sides of the lamellae, branched or sometimes simple (vs. simple to hardly branched or absent in P. kozlovii); papillae of the leaf lamina located on the dorsal side of the lamina, branched or sometimes simple (vs. mostly simple to hardly branched or absent in P. kozlovii). It is known from the steppe slopes in Siberia (Republic Sakha (Yakutia), Indigirka River Basin; Trans-Baikal Territory; Republic of Buryatia; Krasnoyarsk Territory, near the City of Krasnoyarsk).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
