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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.
The grass rarely reproduces by seed. [6] It has been noted to reproduce by seed in Portugal, [9] but does not do so in the United States, [10] and it was described as "incapable of fruiting" in Japan. Seeds are sometimes observed but they are apparently rarely viable, with many studies describing zero germination. [6]
Culms are the hollow stem of the flowering grass plant. These high culms are the main identifying feature of the A. richardii as they have great arching, dense, silvery plumes at the top of the culms which makes them very elegant and stand out from other Austroderia (Kimberley, 2011). The flower head is usually one-sided and drooping.
Cynosurus cristatus, the crested dog's-tail, is a short-lived perennial grass in the family Poaceae, characterised by a seed head that is flat on one side. It typically grows in species rich grassland .
Taeniatherum is a genus of Eurasian and North African plants in the grass family. [3] [4] [5]The only recognized species is medusahead (Taeniatherum caput-medusae) which is native to southern and central Europe (from Portugal to European Russia), North Africa (Algeria, Morocco, Tunisia), and Asia (from Turkey and Saudi Arabia to Pakistan and Kazakhstan).
The grass is of low nutritional value to livestock. Brome seeds can also mix with sheep wool and lower its value. Moreover, sharp awns of ripe seeds can penetrate sheep's skin into the flesh causing pain and lowering carcass value. If ingested, the strong awns can cause injury to sheep's mouth and even intestine, [2] hence the name "rip gut".
Schizachyrium scoparium, commonly known as little bluestem or beard grass, is a species of North American prairie grass native to most of the contiguous United States (except California, Nevada, and Oregon) as well as a small area north of the Canada–US border and northern Mexico.
Panicum capillare, known by the common name witchgrass, [1] is a species of grass. It is a native plant to most of North America from the East Coast through all of the West Coast and California. It can be found as an introduced species in Eurasia, and as a weed in gardens and landscaped areas. [2] It grows in many types of habitat.