(click on image to enlarge it)
Author(s): James H. Miller & Ted Bodner, Southern Weed Science Society
Source: IPM Images
seeds (click on image to enlarge it)
Author(s): Steve Hurst, USDA-NRCS PLANTS Database
Source: Wikimedia Commons
Paspalum notatum (weed) Fluegg. - (bahiagrass)
For details see the respective page in BugwoodWiki.