orchardgrass
Family
PoaceaeScientific Name
Dactylis glomerataOther Common Names:
orchardgrass
Habit
A clump-forming perennial grass common to pastures and often used as forage. Orchardgrass can be a big problem in tall fescue lawns of residential areas established on existing pasture. In addition, orchard grass seed are grown for commercial forage production and often are found as a contaminate in turf-type tall fescue seed due to similar size and shape. Plants can grow to 2 to 4 ft tall but also tolerate mowing at typical lawn heights.
Leaves
Leaves are light green, folded into a V-shape at the base, have a prominent midrib along the underside, and margins that are rough to the touch. The ligule is a tall jagged membrane and plants lack auricles. Leaves are 10 to 13 inches long and 2 to 10 mm wide.
Identifying Characteristics
Leaves folded in the bud and ligule is tall, pointed and often jagged across the top. The seedhead is a panicle that is densely clustered with fan-shaped spikelets.
Flower Seed Head
Seedhead often borne on tall slender stalk to waist high and consist of a densely clustered panicle with fan-shaped green spikelets. Flowers late spring into early summer.
Seed Fruit
Seed are similar in size and shape to tall fescue. Seed are flat, narrow and may have awns up to 2 mm long.
Where Found
Found in pastures, ditches or any open disturbed site. A serious weed problem in tall fescue lawns.
Leaf Hair on Upper Surface
no hairs
Leaf Arrangement
folded in bud
Mature Leaf Width
Varies:
less than 5 mm,
6 to 15 mm
Stem
flat or oval
Seedhead
panicle
Life Cycle
perennial
Auricle
not present
Ligule
membrane
Ligule Length
more than 3 mm
Plant Type
Grass