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The family Poaceae has a peculiar inflorescence of small spikes organised in panicles or spikes that are usually simply and improperly referred to as spike and panicle. The genus Ficus has an inflorescence called a hypanthodium, which bears numerous flowers on the inside of a convex or involuted compound receptacle. [11]
The name Poaceae was given by John Hendley Barnhart in 1895, [16]: 7 based on the tribe Poeae described in 1814 by Robert Brown, and the type genus Poa described in 1753 by Carl Linnaeus. The term is derived from the Ancient Greek πόα (póa, "fodder") .
Palea, in Poaceae, refers to one of the bract-like organs in the spikelet. The palea is the uppermost of the two chaff-like bracts that enclose the grass floret (the other being the lemma). It is often cleft at the tip, implying that it may be a double structure derived from the union of two separate organs.
Poaceae, also known as the true grasses, is the fourth largest plant family in the world with around 12,000 species and roughly 800 genera. [ 1 ] [ 2 ] They contain, among others, the cereal crop species and other plants of economic importance, such as the bamboos , and several important weeds .
Lolium perenne, common name perennial ryegrass, [1] English ryegrass, winter ryegrass, or ray grass, is a grass from the family Poaceae. It is native to Europe, Asia and northern Africa, but is widely cultivated and naturalised around the world. Lolium perenne, showing ligule and ribbed leaf
The Andropogoneae, sometimes called the sorghum tribe, are a large tribe of grasses (family Poaceae) with roughly 1,200 species in 90 genera, mainly distributed in tropical and subtropical areas. They include such important crops as maize (corn), sugarcane , and sorghum . [ 2 ]
The inflorescence is a wide cluster of branches bearing green leaflike spikelets with darker bases that contain bulbils. Viable seed is rarely produced, and the plant usually reproduces asexually via its basal bulbous sections and via bulbils. [ 2 ]
Panicum dichotomiflorum, known by the common names fall panicgrass, autumn millet (Britain and Ireland), [1] and fall panicum [2] is a species of Poaceae "true grass". It is native to much of the eastern United States and parts of Canada, and it can be found in the Western United States through California.