File:Sonchus oleraceus flowerhead3 (16023187258).jpg
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Summary
DescriptionSonchus oleraceus flowerhead3 (16023187258).jpg |
Introduced yearlong-green annual, erect herb 30-100 cm tall. It exudes white latex if damaged and stems are hollow. Leaves are thin, lyrate-pinnatifid, 6-35 cm long, with irregularly toothed margins ending in soft spines and usually with acute auricles. Flowerheads are panicles, with heads (5-6 mm wide) containing yellow petal-like flowers. Fruits are wrinkled throughout and topped with a parachute of silky hairs. Flowering is throughout the year. A native of Europe, it is a weed of disturbed areas, such as roadsides, stockyards, dairy laneways and cropping. It is well adapted to a wide range of soils and environments. Highly palatable and nutritious. Only a nuisance weed of pastures in difficult to access areas, as it is readily grazed by stock where they can reach it. Can be a problem in reduced-till and stubble retention systems due to herbicide resistance. Can act as an alternative host to pest and diseases of crops. Can be controlled by grazing, chipping, cultivation and herbicides. For control, it is essential to prevent its prolific seed production. |
Date | |
Source | Sonchus oleraceus flowerhead3 |
Author | Harry Rose from South West Rocks, Australia |
Licensing
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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/16023187258. 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
Captions
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some value
21 July 2006
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:35, 26 May 2015 | ![]() | 2,592 × 1,944 (2.63 MB) | Amada44 | Transferred from Flickr via Flickr2Commons |
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Metadata
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Camera manufacturer | NIKON |
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Camera model | E5400 |
Exposure time | 10/1,639 sec (0.0061012812690665) |
F Number | f/7.9 |
ISO speed rating | 50 |
Date and time of data generation | 06:40, 21 July 2006 |
Lens focal length | 5.8 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | E5400v1.3 |
File change date and time | 18:48, 21 September 2014 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.2 |
Date and time of digitizing | 06:40, 21 July 2006 |
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 | 28 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Unique image ID | aae2ef03d579e1704b55841e035134bd |
Keywords |
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IIM version | 4 |