Annual bluegrass
June 4, 2015
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EmailPoa annua L. Poaceae (Grass family)
Life cycle
Clump-forming winter or summer annual.
Annual bluegrass clump.
Leaves
Hairless, soft, light green leaves are folded in the bud and lack auricles. Leaves have linear margins (sides are parallel) and distinctive boat-shaped tips.
Boat-shaped leaf tip of annual grass.
Ligule
Slightly pointed membranous ligule.
Stems
Upright, bending, up to 1-foot-tall stems are clump-forming, enlarge by tillering and may root at the lower nodes.
Flowers and fruit
The seedhead is a greenish white open panicle made up of single or paired branches that form a pyramid shape. Each spikelet contains two to six flowers.
Annual bluegrass seedhead.
Reproduction
Seeds.
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