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Poa annua, or annual meadow grass (known in America more commonly as annual bluegrass or simply poa), is a widespread low-growing turfgrass in temperate climates. Notwithstanding the reference to annual plant in its name, perennial bio-types do exist. [2] This grass originated as a hybrid between Poa supina and Poa infirma. [3]
A perennial bunch grass, it grows small, narrow tufts of several erect stems which grow 0.5–1.5 m (1 ft 8 in – 4 ft 11 in) tall. It has a thick, fibrous root system, sometimes with rhizomes, the stems may form stolons. It has flat leaves each up to a centimeter wide at the base and rapidly narrowing to a point. [3]
Since the 1950s and early 1960s, 90% of Kentucky bluegrass seed in the United States has been produced on specialist farms in Idaho, Oregon and Washington. During the 1990s [citation needed] botanists began experimenting with hybrids of Poa pratensis and Texas bluegrass (P. arachnifera), with the goal of creating a drought and heat-resistant ...
"Bluegrass": The seed pods go from green to purplish blue to brown. During the purplish blue phase the seed stems have a navy-blue coating. Poa trivialis (rough meadow-grass), showing the ligule structure. Poa [2] is a genus of about 570 species of grasses, native to the temperate regions of both hemispheres.
Festuca (fescue) is a genus of flowering plants belonging to the grass family Poaceae (subfamily Pooideae). They are evergreen or herbaceous perennial tufted grasses with a height range of 10–200 cm (4–79 in) and a cosmopolitan distribution , occurring on every continent except Antarctica . [ 2 ]
Tussock grasses or bunch grasses are a group of grass species in the family Poaceae.They usually grow as singular plants in clumps, tufts, hummocks, or bunches, rather than forming a sod or lawn, in meadows, grasslands, and prairies.
[48] [49] Grass pollen has a single pore and can vary a lot in size, from about 20 to over 100 micrometers, and this size difference has been looked into for clues about past habitats, to tell apart domesticated grasses from wild ones, [50] [51] [52] and to indicate various biological features like how they perform photosynthesis, [53] their ...
Over 77 °F (25 °C), the growth rate of the fungus decreases significantly, and it ceases at 85 °F (29 °C). 8 Turf grass that is poor in nutrition and are slow growing are areas that are more susceptible to red thread disease. 2 The fungus grows from the thread like red webbing structures called sclerotia. 1 The sclerotia can survive in leaf ...
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