NEW TO OKLAHOMA: HYPOCHAERIS GLABRA L. (ASTERACEAE) Amy K Buthod Oklahoma Biological Survey/Oklahoma Natural Heritage Inventory Robert Bebb Herbarium The University of Oklahoma 111 East Chesapeake Norman, Oklahoma 73071 amybuthod@ou. edu ABSTRACT This paper documents the occurrence of a vascular plant species previously unknown to the flora of Oklahoma. Hypochaeris glabra L., a native of Europe, was discovered in a naturalized population in McCurtain County in southeastern Oklahoma, KEY WORDS: Hypochaeris glabra, Asteraceae, Oklahoma, exotic Hypochaeris glabra L. (Asteraceae, Cichorieae; smooth cat's ear) is an annual species native to Europe (Bogler 2006). In North America, it has been reported from Pacific coast states, the Northeast, and the Southeast, including the states of Arkansas and Texas (Kartesz 2011; USD A, NRCS 2011). The population documented here was growing in a frequently mowed cemetery just west of Redland, Oklahoma. Associated species included Carex sp., Medicago sp., and a large population of Escobar ia missouriensis. About fifty plants of 'the Hypochaeris were noted. This is the first report of the species in the state of Oklahoma (Hoagland et al. 2011), Hypochaeris glabra L. Oklahoma. McCurtain Co.: From Redland, 0.8 mi W and 0.5 mi N on E side of road at Redland Cemetery; 15 S 344004 3754285; T7S R25E Sec. 27, 19 Apr 2011, Buthod AB- 9193 (OKL). Figure 1. ACKNOWLEDGEMENTS This work was supported by internal funding from the Oklahoma Biological Survey at the University of Oklahoma. LITERATURE CITED Bogler, D.J. 2006. Hypochaeris. Pp. 297-299, in Flora of North America Editorial Committee (eds.). Flora of North America North of Mexico, Vol. 19. New York and Oxford. Hoagland, B.W., AK. Buthod, I.H. Butler, P.H.C. Crawford, A.H. Udasi, W.J. Elisens, and R.J. Tyrl. 2011. Oklahoma Vascular Plants Database. Oklahoma Biological Survey, Univ. of Oklahoma, Norman, Sep 2011. Kartesz, J.T. 2011. North American Plant Atlas. The Biota of North America Program (BONAP), Chapel Hill, North Carolina. Sq5 2011. USD A NRCS. 2011. The PLANTS Database National Plant Data Team, Greensboro, North Carolina, Sep 2011. Buthod: Hypochaeris glabra \n Oklahorr Figure 1 . Hypochaeris glabra from the reported population in McCurtain Co. , Oklahonn