This paper presents an alien plant species that has recently migrated into Romania, namely Bidens bipinnata L. For this species, the following information is provided: occurrence in Romania, a short botanical description, general distribution, way of migration, and general aspects regarding its biology, ecology, and invasive character. | Turk J Bot 32 (2008) 255-258 © TÜB‹TAK Research Note New Alien Species for the Flora of Romania: Bidens bipinnata L. (Asteraceae) 1, 2 Culit,a˘ SÎRBU *, Adrian OPREA 1 University of Agricultural Sciences and Veterinary Medicine Iafli, Faculty of Agriculture, 3, Mihail Sadoveanu Street, Iafli, ROMANIA 2 Botanic Garden “A. Fa˘tu”, 7-9, Dumbrava Roflie Street, Iafli, ROMANIA Received: Accepted: Abstract: This paper presents an alien plant species that has recently migrated into Romania, namely Bidens bipinnata L. For this species, the following information is provided: occurrence in Romania, a short botanical description, general distribution, way of migration, and general aspects regarding its biology, ecology, and invasive character. Key Words: Alien plants, Bidens, Asteraceae, weeds, Romania Introduction The alien flora of Romania currently includes 435 species ( of the Romanian flora), of which are neophytes and archaeophytes (Ciocârlan, 2000; Anastasiu & Negrean, 2005). New alien species have continuously been reported in recent years (Kovács, 2004; Sîrbu, 2004; Oprea, 2005; Oprea & Sîrbu, 2006 etc.), thus increasing the number of nonnative taxa in this country. Materials and Methods The presence in Romania and invasive character of the species are documented on the basis of our recent (20052006) field studies. Cross-references in the literature are also used. The herbarium specimens have been deposited in the general herbarium of the University of Agricultural Sciences and Veterinary Medicine “I. Ionescu de la Brad” Iafli (IASI). Results and Discussion The genus Bidens L. was previously represented in the Romanian flora by 5 species, of which 2 are indigenous, with a Eurasian distribution (Bidens cernua L., B. tripartita L.) (Nyárády, 1964), and 3 are alien, native of North America: Bidens vulgata Greene (Morariu, 1966), B. frondosa L. (Vicol, 1970), and B. connata Muhl. ex. Willd. (Ciocârlan, 1993). In August .
