Tropical spiderwort (a.k.a. Benghal dayflower) Commelina benghalensis<BR>tropical Africa native <BR>annual or perennial <BR>seeds and rhizomes <BR>above and below ground flowers <BR>1,600 seeds/plant <BR>alternate host of southern root-knot nematode <BR>Reservoir for southern stem blight (white mold) <BR>#31 in World’s Worst Weeds (Holm’s) <BR>