| 翻訳と辞書 |
| Ambrosia trifida ： ウィキペディア英語版 |
Ambrosia trifida
''Ambrosia trifida,'' called giant ragweed, is a species of flowering plant in the sunflower family. It is native to North America, where it is widespread in Canada, the United States, and northern Mexico.〔 It is present in Europe and Asia as an introduced species, and it is known as a common weed in many regions.〔(''Ambrosia trifida''. ) Germplasm Resources Information Network (GRIN).〕 Its common names include great ragweed, Texan great ragweed, giant ragweed, tall ragweed, blood ragweed, perennial ragweed, horseweed,〔(''Ambrosia trifida''. ) Integrated Taxonomic Information System (ITIS).〕 buffaloweed, and kinghead.〔(''Ambrosia'' spp. ) Encycloweedia. California Department of Food and Agriculture.〕
==Description==
This is an annual herb usually growing up to tall, but known to reach over in rich, moist soils. The tough stems have woody bases and are branching or unbranched.〔 Most leaves are oppositely arranged. The blades are variable in shape, sometimes palmate with five lobes, and often with toothed edges. The largest can be over long by wide. They are borne on petioles several centimeters long. They are glandular and rough in texture. The species is monoecious, with plants bearing inflorescences containing both pistillate and staminate flowers. The former are clustered at the base of the spike and the latter grow at the end. The fruit is a bur a few millimeters long tipped with several tiny spines.〔〔(''Ambrosia trifida''. ) The Jepson eFlora 2013.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Ambrosia trifida」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|