File:Myriophyllum aquaticum habit6 (15105942889).jpg
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DescriptionMyriophyllum aquaticum habit6 (15105942889).jpg | Introduced, warm-season, perennial aquatic or semi-aquatic herb that roots freely from the lower nodes. Stems are to 5 m long, often protruding about 30 cm above the water. Emergent leaves occur in whorls of 4-6 and are hairless, grey-green and feather-like (10-18 pairs of leaflets). Only female plants are present in Australia; flowers are solitary and tiny (to 0.5 mm long) in the leaf axils. Flowering is during the warmer months. A native of central South America, it is an escapee from aquariums and water-gardens, and now an environmental weed. Found in shallow, still to slow-flowing, dams, pools and creeks, especially if nutrient enriched. Spread only by stem fragments via humans and water as fruit are not formed in Australia. Can form dense stands that choke waterways and exclude native plants and animals. Control by manual removal over the warmer months; dry out in the sun and don’t dispose of near creeks or ditches. There are no registered herbicides for control. |
Date | |
Source | Myriophyllum aquaticum habit6 |
Author | Harry Rose from South West Rocks, Australia |
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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/15105942889. 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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current | 15:06, 26 May 2015 | 4,000 × 3,000 (6.48 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 | 1/100 sec (0.01) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 14:54, 19 September 2014 |
Lens focal length | 25.033 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Picasa |
File change date and time | 10:41, 20 September 2014 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 14:54, 19 September 2014 |
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Image compression mode | 5 |
APEX shutter speed | 6.65625 |
APEX aperture | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
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 | 37f17e0b7e93a1b137d5871112dd538c |
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IIM version | 4 |