First report of Conyza sumatrensis in Bulgaria
Conyza sumatrensis (Asteraceae) was reported in 2009 in Bulgaria where it is relatively widespread, being recorded in 7 out of 20 floristic regions. The species grows mainly in man-made habitats but it was also found in some secondary grasslands. C.;sumatrensis is thought to have been present in the country for at least 2 decades during which period it was probably confused with C. canadensis and C. bonariensis. Observations suggest that the species is invasive in Bulgaria.
Vladimirov V (2009) Erigeron sumatrensis (Asteraceae): a recently recognized alien species in the Bulgarian flora. Phytologia balcanica 15(3), 361-365.