File:Carduus pycnocephalus flowerhead11 Denman - Flickr - Macleay Grass Man.jpg
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![File:Carduus pycnocephalus flowerhead11 Denman - Flickr - Macleay Grass Man.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Carduus_pycnocephalus_flowerhead11_Denman_-_Flickr_-_Macleay_Grass_Man.jpg/506px-Carduus_pycnocephalus_flowerhead11_Denman_-_Flickr_-_Macleay_Grass_Man.jpg?20180220170955)
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[edit]DescriptionCarduus pycnocephalus flowerhead11 Denman - Flickr - Macleay Grass Man.jpg | Introduced, cool season, annual or biennial, erect herb usually 0.6-1 m tall. Leaves form rosettes when young; they are lobed, spiny & slightly woolly below; rosette leaves may have white patches. Stems are slightly woolly or cobwebby & have spiny discontinuous wings along their length. Heads are cylindrical, solitary or in clusters of 2-3 and occur on short peduncles. Florets are tubular and pinkish-purple. Germinates in autumn & flowering is in spring. Mostly occurs in areas with more than 500 mm rainfall on soils of moderate to high fertility (e.g. stock camps, rabbit diggings, etc.). Establishes readily in bare, disturbed patches in paddocks, roadsides, waste ground & around cultivated areas. Seeds are spread by wind or by animals. Competitive with pastures & is avoided by stock due to spines. Can contaminate wool & cause mechanical injury to stock & farm dogs. Potentially toxic to stock due to nitrate levels. Dense pasture cover at the end of summer will inhibit germination. Slashing close to flowering can reduce seed set, but results are inconsistent. Grazing with goats can also reduce seed set. Effective control in pastures can be achieved by boom spraying small plants; spray-grazing at the rosette stage and chipping or spot spraying isolated plants. |
Date | |
Source | Carduus pycnocephalus flowerhead11 Denman |
Author | Harry Rose from Dungog, Australia |
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This image was originally posted to Flickr by Macleay Grass Man at https://flickr.com/photos/73840284@N04/25368609191. It was reviewed on 5 November 2016 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 November 2016
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:09, 20 February 2018 | ![]() | 2,063 × 2,444 (1.47 MB) | Salicyna (talk | contribs) | Cropped 48 % horizontally and 19 % vertically using CropTool with precise mode. |
11:27, 5 November 2016 | ![]() | 4,000 × 3,000 (3.72 MB) | Josve05a (talk | contribs) | == {{int:filedesc}} == {{Information |Description=Introduced, cool season, annual or biennial, erect herb usually 0.6-1 m tall. Leaves form rosettes when young; they are lobed, spiny & slightly woolly below; rosette leaves may have white patches. Stems... |
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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/3.5 |
ISO speed rating | 80 |
Date and time of data generation | 14:22, 15 October 2015 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Picasa |
File change date and time | 09:28, 23 October 2015 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 14:22, 15 October 2015 |
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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 | 55ccac17cdd0ba1f0c2fd77207870cc9 |
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IIM version | 4 |