Leaves rolled in the bud (i.e. smooth crabgrass) Leaves folded in the bud (i.e. goosegrass)

Leaves rolled in the bud (i.e. smooth crabgrass) Leaves folded in the bud (i.e. goosegrass) Common Name: yellow foxtail Family: Poaceae Genus: Seta...
Author: Bernard Preston
2 downloads 0 Views 3MB Size
Leaves rolled in the bud (i.e. smooth crabgrass)

Leaves folded in the bud (i.e. goosegrass)

Common Name: yellow foxtail Family: Poaceae Genus: Setaria Species: glauca Summer annual

•long, silky hairs near leaf base only (distinguish from giant and green) •ligule is a fringe of hairs •Seedhead yellow

Common Name: green foxtail Family: Poaceae Genus: Setaria Species: viridis Summer annual

•leaves have no hairs •ligule is a fringe of hairs •seedhead greenish

Common Name: giant foxtail Family: Poaceae Genus: Setaria Species: faberi Summer annual

•upper surface of leaves covered in short hairs, except at the base • ligule fringe of hairs •seedhead larger than green or yellow foxtail, and droops when mature

Common Name: broadleaf signalgrass Family: Poaceae Genus: Brachiaria Species: platyphylla summer annual

•no hairs on leaf blades except margins •leaf sheaths hairy, often maroon •ligule is a narrow membrane fringed with hairs •rooting stem nodes •short blades sick out from stem

Common Name: fall panicum Family: Poaceae Genus: Panicum Species: dichotomiflorum Summer annual

•stem will bend at the nodes = zig-zag growth pattern •ligule is a fringe of hairs often fused at the base •prominent white midvein on leaf blades •hairs on lower surface of leaf blades as seedling, glabrous when mature

Common Name: crowfoot grass Family: Poaceae Genus: Dactyloctenium Species: aegyptium annual

Hairs extend outward from the margins at even spacing, rest of the plant usually hairless Seedhead resembles a crow’s foot Ligule is fringed, membranous at base

Common Name: bermudagrass Family: Poaceae Genus: Cynodon Species: dactylon perennial

•has rhizomes and stolons that root at the nodes •ligule is a fringe of hairs •leafs are sparsely hairy above, margins are rough •hairy collar region

Common Name: large crabgrass Family: Poaceae Genus: Digitaria Species: sanguinalis Summer annual

•densely hairy leaf and sheath •roots at the stem nodes, smooth crabgrass does not •large, jagged membranous ligule

Common Name: smooth crabgrass Family: Poaceae Genus: Digitaria Species: ischaemum Summer annual

•sheath and leaves generally without hairs (may be a few sparse hairs) •does not root at the nodes like large crabgrass

Common Name: goosegrass Family: Poaceae Genus: Eleusine Species: indica Summer annual

•Flattened stems with a white center •ligule fringed, uneven, and membranous •Leaves folded in the bud

Common Name: johnsongrass Family: Poaceae Genus: Sorghum Species: halepense perennial

•has rhizomes •very large, membranous ligule •leaf blades mostly glabrous, a few hairs may appear near the base •prominent white midvein on blades •may reach 6.5 feet tall!

Common Name: shattercane Family: Poaceae Genus: Sorghum Species: bicolor Summer annual

•Leaf blades wider and longer than johnsongrass when mature •No rhizomes •Large, membranous ligule

Common Name: annual bluegrass Family: Poaceae Genus: Poa Species: annua annual

•Ligule pointed and membranous •Leaves are light green and glabrous •Leaf sheaths compressed/flattened, without hairs

Common Name: dallisgrass Family: Poaceae Genus: Paspalum Species: dilatatum perennial

•Leaves rolled in the bud with hairs near collar only •Short rhizomes •Tall, membranous ligule •Seedhead spikelets covered with black, silky hairs

Common Name: barnyardgrass Family: Poaceae Genus: Echinochloa Species: crus-galli Summer annual

•No ligule •Leaf blades glabrous, may have a few hairs at the base •White midvein on leaf blades

Common Name: Japanese stiltgrass Family: Poaceae Genus: Microstegium Species: vimineum Summer annual

•Thrives in shaded areas •Roots at the nodes •Midvein does not divide leaf into equal halves •Very short membranous ligule •Leaf blades sparsely hairy on both surfaces