2026-04-17T11:27:48Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/326302025-11-19T20:46:04Zcom_2072_1057col_2072_478779col_2072_478917

00925njm 22002777a 4500 dc Molero i Briones, Julià author 2012-11-09T13:44:24Z 2012-11-09T13:44:24Z 2009 2012-11-09T13:44:24Z The presence of Ursinia nana, an Anthemideae of South-African origin which has been introduced into the NE Iberian Peninsula, is reported for the fi rst time in Europe. The data offered cover its precise location, morphology, chromosome number, ecology and a population census, as well as its life cycle, fl oral structure, reproductive biology and fruit dispersal mechanisms. Of special note are the clear predominance of autogamy (geitonogamy) over xenogamy as a reproductive system and the large number of fruits produced with high and immediate germinative capacity. These characteristics permit rapid colonization by the introduced species, which can become invasive. However, fruit predation by the ant Messor barbarus points to a natural mechanism that helps regulate population growth and makes biological control possible. Finally its possibilities of expansion in the colonized area and of naturalization in the NE Iberian Peninsula are assessed. Espècies introduïdes Paràsits de les plantes Compostes Catalunya Espanya Introduced organisms Plant parasites Compositae Catalonia Spain Ursinia nana (Anthemideae, Asteraceae), and adventive from South Africa which is becoming naturalized in the Iberian Peninsula. Observations about its reproductive biology and fruit dispersal mechanism.