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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. [7] It is named after an Alabama plantation owner, Colonel William Johnson, who sowed its seeds on river-bottom farm land circa 1840. The ...
A grass valley (also vega and valle) is a meadow located within a forested and relatively small drainage basin such as a headwater. Grass valleys are common in North America, where they are created and maintained principally by the work of beavers or browsers feeders. Rarely, they are associated with cienegas.
Xanthorrhoea johnsonii (also known as Johnson's Grass Tree) is a large plant in the genus Xanthorrhoea found in eastern Australia. [1] The trunk can grow to 5 metres tall. Older foliage is very strong, hence one of the common names being "steel grass", and is commonly used in floral design where it can be bent and looped without breaking.
All gene samples of Johnson's seagrass from Indian River Lagoon over a 17 year study were genetically uniform. In the same study it was determined that due to the lack of genetic diversity, Johnson's seagrass was a clone of H. ovalis, closely related to populations in Africa and Antigua. The clone may be derived from a recent introduction from ...
State grass Scientific name Image Year adopted California: Purple needlegrass: Nassella pulchra: 2004 [1] Colorado: Blue grama: Bouteloua gracilis: 1987 [2] Illinois: Big bluestem (state prairie grass) Andropogon gerardii: 1989 [3] Kansas: Little bluestem: Schizachyrium scoparium (Andropogon scoparius) 2010 [4] Minnesota: Wild rice (state grain ...
The membranous ligule can be very short 1–2 mm (Kentucky bluegrass, Poa pratensis) to very long 10–20 mm (Johnson grass, Sorghum halepense), it can also be smooth on the edge or very ragged. Some grasses do not have a ligule, for example barnyardgrass ( Echinochloa crus-galli ).
Tridens flavus, known as purpletop, purpletop tridens, tall redtop, greasy grass, and grease grass, [1] [2] [3] is a large, robust perennial bunchgrass. The seeds are purple, giving the grass its common name. The seeds are also oily, leading to its other common name, "grease grass". It reproduces by seed and tillers.
Australian Johnson grass virus; Maize dwarf mosaic virus — Kansas I strain; Johnsongrass mosaic virus (JGMV) is a plant pathogenic virus of the family Potyviridae.