| 词条 | Ventenata dubia |
| 释义 |
|image = Ventenatadubia.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Monocots |unranked_ordo = Commelinids |ordo = Poales |familia = Poaceae |genus = Ventenata |species = V. dubia |binomial = Ventenata dubia |binomial_authority = (Leers) Coss. }}Ventenata dubia is a species of grass known by the common names North Africa grass and wiregrass. It is native to southern Europe, North Africa and the Middle East. It is becoming well known in North America, where it is an introduced species and a noxious weed of cultivated and disturbed habitat. It is problematic in the Pacific Northwest, where it was first identified in Washington in 1952[1] and Idaho in 1957.[2] It was found in Utah in 1996.[3] It probably spreads when it gets mixed in with grass seed and is transported and inadvertently planted.[3] This is an annual grass growing 15 to 70 centimeters tall with thin, branching stems that are naked and wiry. These wiry stems make the grass hard to cut.[2][3] The inflorescence is an open panicle with very slender, spreading branches bearing spikelets at their tips. The spikelet is 1 to 1.5 centimeters in length and has riblike longitudinal veins. The upper flower has a wavy awn up to 1.5 centimeters long. References1. ^{{Cite web |url=http://herbarium.usu.edu/webmanual/info2.asp?name=Ventenata_dubia&type=treatment |title=Grass Manual Treatment |access-date=2010-11-19 |archive-url=https://web.archive.org/web/20120608015554/http://herbarium.usu.edu/webmanual/info2.asp?name=Ventenata_dubia&type=treatment |archive-date=2012-06-08 |dead-url=yes |df= }} 2. ^1 Prather, T. (2009). Ventenata dubia: An increasing concern to the inland northwest region{{Dead link|date=July 2018 |bot=InternetArchiveBot |fix-attempted=yes }}. Center for Invasive Plant Mgmt. 3. ^1 2 Global Invasive Species Team Weed Alert External links
10 : Pooideae|Grasses of Asia|Grasses of Africa|Grasses of Europe|Grasses of Russia|Flora of North Africa|Flora of Eastern Europe|Flora of Southeastern Europe|Flora of Western Asia|Invasive plant species in the United States |
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