File:Senecio atratus (blacktip ragwort) (Rocky Mountains National Park, Colorado, USA) 2 (15574829529).jpg
![File:Senecio atratus (blacktip ragwort) (Rocky Mountains National Park, Colorado, USA) 2 (15574829529).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/0/03/Senecio_atratus_%28blacktip_ragwort%29_%28Rocky_Mountains_National_Park%2C_Colorado%2C_USA%29_2_%2815574829529%29.jpg/616px-Senecio_atratus_%28blacktip_ragwort%29_%28Rocky_Mountains_National_Park%2C_Colorado%2C_USA%29_2_%2815574829529%29.jpg?20191112042141)
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[edit]DescriptionSenecio atratus (blacktip ragwort) (Rocky Mountains National Park, Colorado, USA) 2 (15574829529).jpg |
Senecio atratus Greene, 1896 - blacktip ragwort in Colorado, USA. Plants are multicellular, photosynthesizing eucaryotes. Most species occupy terrestrial environments, but they also occur in freshwater and saltwater aquatic environments. The oldest known land plants in the fossil record are Ordovician to Silurian. Land plant body fossils are known in Silurian sedimentary rocks - they are small and simple plants (e.g., Cooksonia). Fossil root traces in paleosol horizons are known in the Ordovician. During the Devonian, the first trees and forests appeared. Earth's initial forestation event occurred during the Middle to Late Paleozoic. Earth's continents have been partly to mostly covered with forests ever since the Late Devonian. Occasional mass extinction events temporarily removed much of Earth's plant ecosystems - this occurred at the Permian-Triassic boundary (251 million years ago) and the Cretaceous-Tertiary boundary (65 million years ago). The most conspicuous group of living plants is the angiosperms, the flowering plants. They first unambiguously appeared in the fossil record during the Cretaceous. They quickly dominated Earth's terrestrial ecosystems, and have dominated ever since. This domination was due to the evolutionary success of flowers, which are structures that greatly aid angiosperm reproduction. The blacktip ragwort shown above occurs in subalpine environments in parts of mountainous western America. Classification: Plantae, Angiospermophyta, Asterales, Asteraceae/Compositae Locality: Rainbow Curve, Rocky Mountains National Park, northern Colorado, USA More info. at: <a href="http://www.americansouthwest.net/plants/wildflowers/senecio-atratus.html" rel="nofollow">www.americansouthwest.net/plants/wildflowers/senecio-atra...</a> |
Date | |
Source | Senecio atratus (blacktip ragwort) (Rocky Mountains National Park, Colorado, USA) 2 |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15574829529 (archive). It was reviewed on 12 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
12 November 2019
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current | 04:21, 12 November 2019 | ![]() | 1,768 × 1,720 (1.05 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Exposure time | 1/640 sec (0.0015625) |
F-number | f/8 |
Date and time of data generation | 11:38, 27 July 2007 |
Lens focal length | 200 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
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Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 18:12, 10 November 2014 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 11:38, 27 July 2007 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
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Date metadata was last modified | 13:12, 10 November 2014 |