234 OHIO BIOLOGICAL SURVEY 



1998. Matricaria chamoiuilla L. German Camomile. Ottawa County. 



From Europe. 



1999. Matricaria matricarioides (Lees.) Port. Rayless Camomile. 



Stark County. From the Pacific coast. 



2000. Tanacetum vulgare L. Common Tansy. General. Naturalized 



from Europe. 



2001. Artemisia caudata Mx. Wild Wormwood. Erie County. 



2002. Artemisia annua L. Annual Wormwood. Rather general. In- 



troduced. 



2003. Artemisia biennis Willd. Biennial Wormwood. Ashtabula, Cuy- 



ahoga, Lucas, Auglaize, Shelby, Wyandot, Franklin. 



2004. Artemisia vulgaris L. Connnon Mugwort. Escaped in Lake and 



( 'Uyahoga Counties. 



2005. Artemisia ])ontica L. Roman Wormwood. Champaign, Portage. 



From Europe. 



2006. Artemisia gnaphalodes Nutt. Prairie Cudweed. Lake County. 



From the West. 



2007. Ereehtites hieracifolia (L.) Raf. Fireweed. General. 



2008. Mesadenia reniformis (Muhl.) Raf. Great Indian-plantain. 



Clermont, Greene. 



2009. Mesadenia atriplicifolia (L.) Raf. Pale Indian-plantain. Gen- 



eral. 



2010. Mesadenia tuberosa (Xutt.) Britt. Tuberous Indian-plantain. 



INlontgomery, Champaign, Logan. 



2011. Synosma suaveolens (L.) Raf. Sweet-scented Indian-plantain. 



Cuyahoga, Lorain, Stark, Clark, Jackson. 



2012. Senecio aureus L. Golden Squaw-weed. General. 



2013. Senecio obvatus Muhl. Roundleaf S(|uaw-weed. Rather general. 



2014. Senecio panperculus Mx. Balsam S(|uaw-weed. Ottawa County. 



2015. Senecio vulgaris L. Connnon Groundsel. Lake, Lorain, Aug- 



laize. From Europe. 



2016. Tussilago fai-fara L. Coltsfoot. Lake, Cuyahoga. From Europe. 



2017. Arctium tomentosum (Lam.) Schk. Woolly Burdock. Erie 



County. From Europe. 



2018. Arctium lai^pa L. Great Burdock. Lorain, Cuyahoga. From 



Euro])('. 



2019. Arctium minus Schk. Common Burdock. General and abun- 



dant. Naturalized from Europe. 



