File:Polygonum arenastrum branch2 (14921642816).jpg
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Summary
[edit]DescriptionPolygonum arenastrum branch2 (14921642816).jpg |
Introduced, warm-season, annual or biennial, mat-forming herb, with a deep taproot. Stems are prostrate, to 1 m long and arise from the one point. Leaves are all the same size, hairless, blue-green and 8-30 mm long. Flowers are small (1.8-3 mm long), pink or white and solitary or in small clusters in the leaf axils. Flowering is in spring and summer. A native of Europe, it is a weed of disturbed areas, particularly roadsides, wasteland, cropping paddocks, gateways and degraded pastures. An indicator of poor ground cover. Can form dense mats in newly sown pastures and is a weed of summer fallows or summer crops such as lucerne. Strongly competitive, it has vigorous seedlings with a strong tap root; mature plants inhibit the germination of many seedlings (allelopathic effect) particularly medic species. May be grazed by cattle and sheep, usually without a problem, but seeds can cause photosensitization in cattle and enteritis in all types of livestock; leaves occasionally cause dermatitis. Controlled with healthy vigorous pastures. Registered herbicides are available for control. |
Date | |
Source | Polygonum arenastrum branch2 |
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@N04/14921642816. 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 | 19:40, 26 December 2019 | 3,730 × 2,400 (2.1 MB) | Salicyna (talk | contribs) | Cropped 7 % horizontally, 20 % vertically using CropTool with precise mode. | |
15:15, 26 May 2015 | 4,000 × 3,000 (3.4 MB) | 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 | Canon |
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Camera model | Canon PowerShot A650 IS |
Exposure time | 1/1,250 sec (0.0008) |
F-number | f/3.5 |
ISO speed rating | 80 |
Date and time of data generation | 14:07, 17 December 2010 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Picasa |
File change date and time | 20:05, 17 August 2014 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 14:07, 17 December 2010 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 10.28125 |
APEX aperture | 3.625 |
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 | Portrait |
Unique image ID | 0c0b5541a18e3a9357c0277b8a2794aa |
Keywords |
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IIM version | 4 |