Annual bluegrass
July 31, 2015
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EmailPoa annua L.
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 parallel) and distinctive boat-shaped tips.
Annual bluegrass seedhead.
Ligule
Slightly pointed membranous ligule.
Boat-shaped leaf tip of annual bluegrass.
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 comprised of single or paired branches that form a pyramid shape. Each spikelet contains two to six flowers.
Reproduction
Seeds.
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