File:Cirsium vulgare plant7 (12400986685).jpg
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Summary edit
DescriptionCirsium vulgare plant7 (12400986685).jpg |
Introduced, annual or biennial herb. It forms a rosette when young before sending up stems to 1.5 m tall. Leaves are dark green and warty, leaf edges lobed and spiny. Flowerheads are branched, with solitary (or clusters of) purple heads at the end of main branches; each head is bell-shaped, to 5 cm wide and surrounded by spiny bracts. Florets are tubular. Flowering is in late winter to summer. A native of Europe, North Africa and Asia, it is a common weed in disturbed, moister and more fertile areas of pastures and wastelands. Wind blown seeds are viable for up to 10 years and can travel large distances. Reduces the forage potential of pastures and the spines render it unpalatable to livestock and can cause eye injuries. Managed using a number of methods, but it is most important to use pasture management to avoid bare areas. Herbicides may be needed in the first year to reduce populations; they are most effective at the seedling to rosette stage. Slashing when the purple flowers just begin to emerge will minimise regrowth; earlier slashing can stimulate branching and flowering; considerable seed set can occur with later slashing. Low rates of herbicide followed by heavy grazing can be effective, especially if other broadleaf weeds are targeted. |
Date | |
Source | Cirsium vulgare plant7 |
Author | Harry Rose from South West Rocks, Australia |
Licensing edit
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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/12400986685. It was reviewed on 26 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
26 May 2015
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:28, 26 May 2015 | 1,600 × 1,200 (762 KB) | Amada44 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | NIKON |
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Camera model | E5400 |
Exposure time | 2/225 sec (0.0088888888888889) |
F-number | f/7.3 |
ISO speed rating | 50 |
Date and time of data generation | 13:36, 22 July 2005 |
Lens focal length | 6.5 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E5400v1.3 |
File change date and time | 16:41, 9 February 2014 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 13:36, 22 July 2005 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Partial |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 31 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Unique image ID | dcdf99e3cb6726db76d6d1878f2e5a84 |
Keywords |
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IIM version | 4 |