|Information sur la photo|
|Copyright: Greg Hume (greghume)
|Date de prise de vue: 2004-12-05|
|Appareil photographique: Olympus C-8080 WZ|
|Exposition: f/4, 1/80 secondes|
|Versions: version originale, Workshop|
|Date de soumission: 2004-12-23 0:25|
|[Ligne directrice - Note] Note du photographe|
|Common teasel, Dipsacus sylvestris, endemic to Europe. It was introduced to North America possibly as early as the 1700's. Another species, Dipsacus fullonum, was introduced for use in raising the nap of cloth. Possibly, cut-leaved and common teasel were introduced with D. fullonum or introduced accidentally with other plant material from Europe. Teasel has spread rapidly in the last 20-30 years. This rapid range expansion probably was aided by construction of the interstate highway system. Teasel has colonized many areas along interstates. Common teasel sometimes is used as a horticultural plant, which has aided in expansion of its North American range. In particular, the use of teasel in flower arrangements has aided its dispersal, especially to cemeteries. |
A single teasel plant can produce over 2,000 seeds. Depending on conditions, up to 30-80% of the seeds will germinate, so each plant can produce many offspring. Seeds also can remain viable for at least 2 years.
In North America, teasel is an aggressive exotic species that has the capacity to take over prairies and savannas if it is allowed to become established. Lack of natural enemies allows teasel to proliferate. If left unchecked, teasel quickly can form large monocultures excluding all native vegetation.
Exotic species are a particular problem in North America - extirpating native species. Notable examples include kudzu, honeysuckle, garlic mustard, and purple loosestrife.
red45, willie, Luc, coasties, saguzar trouve(nt) cette note utile
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- [2004-12-23 2:23]
Good composition, sharpness, POV and DOF. Nice shot.
This would have been very good with a darker BG.
- [2004-12-23 4:32]
Pros: note, composition, artistic factor
This is an exceptional post Greg. You made excellent use of the light.I like it so much i played around a bit in a workshop with it. I hope you dont mind
- [2004-12-23 16:52]
This is a good composition and I like the backlighting in this shot. Good sharpness too
Very well done and thanks for posting.
- [2004-12-26 11:34]
A very special one, Greg. I like it very much. Simple and beautifull.
A great post: picture and note too.
Very good macro Greg. Excellent detail captured here. POV superb. Very good note too. Good work. TFS