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Galinsoga ciliata : ウィキペディア英語版
Galinsoga quadriradiata

''Galinsoga quadriradiata'' is a species of flowering plant in the daisy family which is known by several common names, including shaggy soldier, peruvian daisy, hairy galinsoga, and fringed quickweed. Its native home is apparently central Mexico, although it has become naturalized in many other places (North and South America, Europe, Japan, Philippines, the northern India, Nepal, etc.).〔(Flora of North America, ''Galinsoga quadriradiata'' Ruiz & Pavón, 1798. )〕〔(Canne-Hilliker, Judith Marie. 1977. Rhodora 79(819): 353-364 ) in English, line drawing on page 354, global distribution map on page 359〕 Hairy Galinsoga is considered a weed throughout it's native and introduced range.〔
==Description==
''Galinsoga quadriradiata'' is an annual herb which varies in appearance. The main stem reaches anywhere from 10 to 60 centimeters (4-24 inches) in height and may branch or not. The petioled leaves are ovate and serrated are opposite branching, and covered coarse, hispid hairs. ''G. quadriradiata'' has a fibrous root system
The small flower heads are up to a centimeter wide (0.4 inches) but typically 2-3mm in diameter and have rounded center filled with many disc florets usually in a shade of bright yellow. There are five white ray florets widely spaced around the center, each an oval shape typically with three crenate teeth at the tip. Both the disk and ray florets are fertile〔(【引用サイトリンク】url=http://www.illinoiswildflowers.info/weeds/plants/peru_daisy.htm )〕 producing a achene with a large pappus.〔〔(Flora of China, ''Galinsoga quadriradiata'' Ruiz & Pavon, 1798. 粗毛牛膝菊 cu mao niu xi ju )〕〔
As an agricultural weed it can reduce crop yields by up to 50%.

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「Galinsoga quadriradiata」の詳細全文を読む



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