Keywords: Lycopusasper.jpg en Lycopus asper from Robert Tatina USDA SCS 1989 Midwest wetland flora Field office illustrated guide to plant species Midwest National Technical Center Lincoln Courtesy of USDA NRCS Wetland Science Institute http //plants usda gov/java/largeImage imageID lyas_002_avp tif Robert Tatina 1989 Template PD-USGov-USDA-NRCS PD-USGov Lycopus asper |