Sagittaria montevidensis subsp. calycina : a new weed species found in Spain
In September 2003, a new invasive plant species was found in rice fields at Lanaja near Huesca (Aragón), Spain. The plant was identified as Sagittaria montevidensis subsp. calycina (Alismataceae). The plants were abundant in the rice fields and their surroundings. It is considered that these plants had been present for some time. Sagittaria montevidensis subsp. calycina is a North American species which occurs in USA and Mexico. A conspecific taxon, Sagittaria montevidensis is considered as an invasive species in Australia, New Zealand and southern USA.
Sources
Child L, Brock JH, Brundu G, Prach K, Pyšek P, Wade PM, Williamson M editors (2003) Plant Invasions. Ecological threats and management solutions. Backhuys Publishers, Leiden, Netherlands, 457 pp.
García Floria MC, León M, Zaragoza C, Aibar J, del Monte JP (2004) Presencia de Sagittaria como infestante en los arrozales de Huesca.
Phytoma-España, no. 161, 51-52.
USDA National Resources Conservation Service. Plant Profile.
http://plants.usda.gov
Western Australia - Department of Agriculture. Declared plants.
http://agwdsrv02.agric.wa.gov.au/dps/version02/01_plantview.asp?page=1&contentID=5&