It is probably not really "freshwater" but I could not enter urban riverside disused plot.
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The correct Latin name is Buddleja davidii, although you have linked with another posting with the same typo you are not linking to the main sightings nor the NBN maps etc.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
I have not intentionally linked it with any other posting (I don't know how to) and don't know NBN maps. I had the name from a book I have at home. But I will accept it may be incorrect. I had seen the J spelling but thought that was the Spanish spelling (where I think it originates - but could be wrong again)
I am using the site to learn, but to show my knowledge or lack of.
Thanks for the correction.
Both Buddleia and Buddleja have long histories of use. Linnaeus used the latter spelling, but should have used the former, so we're left with the question as to whether the spelling should be corrected.
According to the ICBN rules sometimes spellings should be corrected, and sometimes they shouldn't. According to WikiPedia, since the 2006 revision of the rules Buddleja is correct.
Buddlejas are found over much of the world, but Buddleia davidii comes from China. The other species that you sometimes see, Buddleja globosa, comes from western South America.
Lat/Lng: 54.1463, -4.4856
OS grid ref: SC377751