Annual Bluegrass [Poa annua]

Origin: Native to North America
Use: Provides poor grazing to wildlife and fair grazing to livestock.

Plant Description:
General  Characteristics of Annual Bluegrass
Life Span  Annual
Growth Form  Upright, clump-forming, winter annual.
Seeding Rate 
40" Rows:  Broadcast: 
Planting Date   
Planting Depth  
pH requirement 4.8 to 8.0
Rainfall requirement 24 to 60 inches
Soil texture

Cold Tolerance: High
ID Features:
Habit: 		Tufted, bright green, erect to spreading annual, sometimes rooting at the lower nodes.
Culms: 		5-20 cm. tall, flattened, usually decumbent and branched at the base or erect, forming mats.
Blades:   	Flat or folded, flaccid, 1-10 cm. long, 1.5-5 mm. wide, boat-shaped at the tip.
Sheaths: 	Loose, overlapping.
Ligule: 	Rounded at the apex, 2-3 mm. long, membranous.
Inflorescence: 	Open, terminal panicle; pyramidal, 3-8 cm. long, the branches spreading.
Spikelets: 	Crowded, 3-5 mm. long; 2-6-flowered, flat, the rachis articulate
		between the flowers, the uppermost floret imperfect or rudimentary.
Glumes: 	2, keeled, smooth, the first lanceolate, acute, 1.5-2 mm. long, the
		second  obtuse, 2-2.5 mm. long.
Lemma: 	        2.5-3 mm. long, distinctly 5-nerved, the nerves hairy below, the long
		hairs on the lower part of the keel sometimes resembling a web.
Palea: 		About 2 mm. long, 2-keeled and 2-nerved, pubescent on nerves.
Stamens: 	Anthers 0.5-1 mm. long.
Fruit: 		Grain, about 1.5 mm. long.
Habitat: 	Waste places, lawns, pastures, openings in woods, and cultivated ground. May-October.
Remarks: 	Objectionable in lawns, leaving unsightly patches when it dies in early summer.
Special Notes:
Annual Bluegrass [Poa annua] Information #1
Annual Bluegrass [Poa annua] Information #2