Ann. Bot. Fennici 48: 69–73 ISSN 0003-3847 (print) ISSN 1797-2442 (online) Helsinki 31 March 2011 © Finnish Zoological and Botanical Publishing Board 2011 A new hybrid in Pilosella (Asteraceae) from the Tambov Region, European Russia Alexander N. Sennikov Botanical Museum, Finnish Museum of Natural History, P.O. Box 7, FI-00014 University of Helsinki, Finland; and Herbarium, Komarov Botanical Institute of Russian Academy of Sciences, Prof. Popov str. 2, RU-197376 St. Petersburg, Russia (e-mail:
[email protected]) Received 29 June 2009, revised version received 17 Oct. 2009, accepted 20 Oct. 2009 Sennikov, A. N. 2011: A new hybrid in Pilosella (Asteraceae) from the Tambov Region, European Russia. — Ann. Bot. Fennici 48: 69–73. A new hybrid combination Pilosella onegensis Norrl. ¥ P. praealta (Vill. ex Gochn.) F. Schultz & Sch. Bip. is recognised on the basis of its intermediate morphological char- acters, and described under a new binomial name, P. ¥ tambovica Sennikov. All old records of P. caespitosa (Dumort.) P.D. Sell & C. West and many such of “Hieracium nestleri Vill.” from the Tambov Region of European Russia are found referable to P. onegensis. The taxonomy of the genus Pilosella (Aster- (Schuhwerk & Fischer 2003, Bräutigam & Greu- aceae) is heavily complicated with a combina- ter 2007). tion of sexual and apomictic (aposporic) type of A group of Pilosella species with black reproduction. Very few primary species of this styles, cymose inflorescences with yellow or genus exist on the diploid level; they are presum- orange flowers, hairy, mostly rosulate leaves, ably entirely sexual (Merxmüller 1975). The dip- and fragile spreading flagellae (sect.