Monocotyledon | Literature for Poa pratensis
Wagner et al., 1990, 1999. |
Poaceae -- The Grass Family | Bibliography |
Poa pratensis | |
Common name(s): bluegrass, Kentucky bluegrass |
General Information | ||
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Distribution | Native to Europe, widely naturalized in temperate and montane tropical regions.In the Hawaiian Islands, naturalized on O`ahu, Maui, Hawai`i. |
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Habit |
Perennials with extensive rhizomes forming a dense sod; culms slightly compressed, erect, (2-)3-6.5(-10) dm tall. |
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Leaves |
Sheaths smooth, but occasionally somewhat scabrous, closed to ca. 1/2 their length; ligule 0.5-1.7(-3) mm long, margins usually entire, apex truncate; blades numerous, soft, usually green but occasionally glaucescent, flat or usually folded, 1-3(-4.5) mm wide, margins usually scabrous, sometimes slightly pubescent and purple-tinged near collar, apex strongly boat-shaped. |
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Flowers |
Panicles open, often pyramidal, (2-)4-11(-16) cm long, branches spreading or ascending, usually in whorls of (2-)4-5(-9) per node; spikelets green or purple-tinged, 2-4-flowered, crowded, ovate, (3-)4-5(-6) mm long, strongly compressed; glumes scabrous on keel, first glume 1.8-2.5(-3) mm long, 1-nerved, second glume 2.2-3.3 mm long, 3-nerved; lemmas 2.5-4 mm long, 3-5-nerved, lateral nerves weak, base with copious cobwebby hairs, keel and marginal nerves sericeous, glabrous between the nerves, apex obtuse or acute; palea nearly as long as lemma. |
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Fruit |
Caryopsis reddish brown, ellipsoid, ca. 1.5 mm long. |
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Chromosomes |
2n = 33-124 |
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