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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 ...
Before European-American settlement, various cultures of Indigenous peoples of the Americas lived in the region. The pre-colonization state of the Bluegrass is poorly known, but it is thought to have been a type of savannah known as oak savanna, with open grassland containing clover, giant river cane (a type of bamboo), and scattered enormous trees, primarily bur oak, blue ash, Shumard's oak ...
These species, commonly called zoysia or zoysiagrass, are found in coastal areas or grasslands. [5] It is a popular choice for fairways and teeing areas at golf courses. The genus is named after the Slovenian botanist Karl von Zois (1756–1799).
Kentucky bluegrass (Poa pratensis) is the most extensively used cool-season grass used in lawns, sports fields, and golf courses in the United States. [14] Annual bluegrass ( Poa annua ) can sometimes be considered a weed.
Map of wood-filled areas in the United States, circa 2000 [1]. In the United States, the forest cover by state and territory is estimated from tree-attributes using the basic statistics reported by the Forest Inventory and Analysis (FIA) program of the Forest Service. [2]
Grasses are unusual in that the meristem is near the bottom of the plant; hence, grasses can quickly recover from cropping at the top. [36] The evolution of large grazing animals in the Cenozoic contributed to the spread of grasses. Without large grazers, fire-cleared areas are quickly colonized by grasses, and with enough rain, tree seedlings.
The Arboretum, State Botanical Garden of Kentucky (Also known as University of Kentucky Arboretum or Lexington Arboretum), 40 hectares or 100 acres (0.40 km 2), is located at the University of Kentucky in Lexington, Kentucky, United States. It is open to the public from dawn to dusk every day of the year.
In the Florida Peninsula the amount of evergreens increases and species richness decreases as northern deciduous species (American Beech, White Oak) reach their southern limits. Upland Hardwood Forest in Central Florida , at the southern end of its range (especially along the Brooksville Ridge), is often hard to differentiate from Mesic Hammock .