File:Lepidium bonariense plant3 (14446282740).jpg
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[edit]DescriptionLepidium bonariense plant3 (14446282740).jpg | Introduced, warm-season, annual or biennial, erect, hairy herb to 50 cm tall. Leaves are all lobed or dissected; the basal leaves being deeply dissected into narrow lobes. Flowerheads are dense racemes, which elongate at maturity. Flowers are small and inconspicuous, with 2 stamens and 4 tiny white petals that are shorter than the sepals. Fruit are siliculas; green and circular, with a shallow notch at the apex. Flowering is in summer and autumn. A native of South America, it is an uncommon weed of crops, roadsides, waste areas and overgrazed pastures. Its abundance in pastures can be an indicator of overgrazing or other disturbances that have created bare ground and/or reduced competition. Relatively palatable and of reasonable feed quality when young. It quickly loses quality at flowering and is known to taint milk and eggs. Control is rarely needed. The most effective management strategy to avoid large populations is a competitive perennial pasture and good grazing management. Herbicides are registered for its control. |
Date | |
Source | Lepidium bonariense plant3 |
Author | Harry Rose from South West Rocks, Australia |
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[edit]This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/14446282740. 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 | 11:39, 5 January 2020 | 3,065 × 2,057 (2.14 MB) | Salicyna (talk | contribs) | Cropped 23 % horizontally, 31 % vertically using CropTool with precise mode. | |
15:00, 26 May 2015 | 4,000 × 3,000 (4.59 MB) | Amada44 (talk | contribs) | Transferred from Flickr via Flickr2Commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A650 IS |
Exposure time | 1/1,250 sec (0.0008) |
F-number | f/3.2 |
ISO speed rating | 80 |
Date and time of data generation | 11:06, 28 June 2009 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 11:06, 28 June 2009 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 11:06, 28 June 2009 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 10.28125 |
APEX aperture | 3.34375 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |