spiny sowthistle, prickly sowthistle, perennial sowthistle
Yellow with 6 petals
Pointed leaves with finely serrated edges; no hair
Taxonomic data last retrieved March 30, 2012, from the Integrated Taxonomic Information System on-line database, http://www.itis.gov.
© 2011–2013 Lebanon Seaboard Corporation. All rights reserved.