Common Name: dallisgrass
Species: Paspalum dilatatum Poir.
Bayer Code: PASDI

Dallisgrass, field paspalum, and thin paspalum are common perennial weeds in turf, and are some of the more difficult-to-control weeds. All three species resemble each other very closely, and field paspalum and thin paspalum are often mistakenly called dallisgrass. Thin paspalum has a glossier, more shiny leaf when young than dallisgrass. Dallisgrass leaf appearance is very similar to crabgrass, which is a dull green appearance.
dallisgrass in turf
[Click on image to view plant details]
dallisgrass seedhead hairs
dallisgrass seedhead
dallisgrass seedhead
dallisgrass seedhead
Page 
 
CharacteristicTypeDescription
Seedhead / Flower racemehairy spikelets arranged in 4 rows on 3 - 8 alternate branches on tall (up to 5 feet in unmowed situations) terminal stalks
Vernation Type rolledleaves rolled in the bud
Ligule Type membranousup to 0.2 inches (5 mm) long, sharp pointed to blunt
Growth Season / Life Cycle perennial weed 
Auricle Type absent 
Leaf Blade Tip Shape sharp-pointedflat, sharply creased, not hairy or with a few hairs at base, hairs behind ligule, edges smooth or rough
Leaf Blade Width broad, greater than 0.2 in0.28 - 0.6 inches (7 - 15 mm) wide
Stolon Presence absent 
Rhizome Presence presentoccasional and very short
Collar Type continuousnot hairy, often hairy on edges
Sheath Margin split with overlapping margins 
Sheath Type flattenedsheath is not densely hairy, often has long hairs near base of plant; slightly creased