Chara virgata (Charophyceae, Characeae) – new species record for the south of the Far East (the Kurils), unusual stem cortex deformation

Chara virgata Kütz. was found in a sphagnum bog on Urup Island of the Kurils. This is a first species record of charophytes for the Sakhalin Region and new species record for the south of the Far East. The plants have notable deformation of stem cortex at old parts rarely noted for Chara L. and unknown for this species.