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Poa pratensis, commonly known as Kentucky bluegrass (or blue grass), smooth meadow-grass, or common meadow-grass, is a perennial species of grass native to practically all of Europe, North Asia and the mountains of Algeria and Morocco.
Weed identification may relate to History of plant systematics, the classification of plants; Botany, the study of plants; Taxonomy, the classification of living things;
[2] [3] [4] It is considered to be one of the ten worst weeds in the world. [5] In the United States, Johnson grass is listed as either a noxious or quarantined weed in 19 states. [ 6 ] With Sorghum bicolor it is a parent of Sorghum × almum , a forage crop also considered a weed in places.
Weeds may also act as a "living mulch", providing ground cover that reduces moisture loss and prevents erosion. Weeds may also improve soil fertility; dandelions, for example, bring up nutrients like calcium and nitrogen from deep in the soil with their tap root, and clover hosts nitrogen-fixing bacteria in its roots, fertilizing the soil directly.
Beneficial weeds can accomplish a number of roles in the garden or yard, including fertilizing the soil, increasing moisture, acting as shelter or living mulch, repelling pests, attracting beneficial insects, or serving as food or other resources for human beings.
Horseweed is commonly considered a weed, and in Ohio, Oregon, and some other locations, [11] it has been declared a noxious weed. [12] [13] It was the first weed to have developed glyphosate resistance, reported in 2001 from Delaware. [14] It can be found in fields, meadows, and gardens throughout its native range.
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]
Geranium maculatum, an Ohio native, is a relative of the common bedding geranium (Pelargonium × hortorum). This list includes plants native and introduced to the state of Ohio, designated (N) and (I), respectively. Varieties and subspecies link to their parent species.