Dichanthelium acuminatum (Introduced)

Dichanthelium acuminatum (Sw.) Gould & C.A.Clark, Ann. Missouri Bot. Gard. 65: 1121 1978 publ. 1979. (syn: Dichanthelium acuminatum var. thurowii (Scribn. & J.G.Sm.) Gould & C.A.Clark; Dichanthelium auburne (Ashe) Mohlenbr.; Panicum acuminatum Sw.; Panicum acuminatum var. thurowii (Scribn. & J.G.Sm.) C.F.Reed; Panicum auburne Ashe; Panicum ciliosum Nash; Panicum comophyllum Nash; Panicum filiculme Ashe; Panicum glutinoscabrum Fernald; Panicum iowense Ashe; Panicum microphyllum Ashe; Panicum nitidum var. pubescens Scribn.; Panicum olivaceum Hitchc. & Chase; Panicum ornatum Ham.; Panicum shastense Scribn. & Merr.; Panicum tectum Willd. ex Spreng.; Panicum thurowii Scribn. & J.G.Sm.; Panicum velutinum Bosc ex Spreng.);
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E. U.S.A. to Ecuador, Caribbean: Alabama, Arkansas, Belize, Colombia, Connecticut, Costa Rica, Cuba, Delaware, District of Columbia, Dominican Republic, Ecuador, El Salvador, Florida, Georgia, Guatemala, Haiti, Honduras, Jamaica, Louisiana, Maryland, Massachusetts, Mexico Central, Mexico Gulf, Mexico Northeast, Mexico Southeast, Mexico Southwest, Mississippi, New Hampshire, New Jersey, New York, Nicaragua, North Carolina, Panamá, Pennsylvania, Puerto Rico, Rhode I., South Carolina, Texas, Venezuela, Vermont, Virginia, West Virginia; Introduced into: Austria, France, Hawaii, New Zealand North, Transcaucasus, Ukraine as per POWO;
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Panicum sp. probably an introduced fodder grass escaped to the wild.

Often mistaken for Panicum maximum. It is actually a hybrid Panicum acuminatum also know as Dichanthelium acuminatum, native of California, introduced as a fodder species. I first saw it in Chandigarh in a govt institute, probably introduced by some landscape designer. It is highly invasive. The hairy spikelets easily differentiate it from P.maximum. 
Several species of Dichanthelium are said to hybridise and hence there is a lot of variation too and though there are several species of Dichanthelium reported in America, many authors consider many of them as varieties of D.acuminatum

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