By Littlelegs
Kent,
United Kingdom 
Angles trumpet, sorry dont know the proper name, Ive been told by a mate that these 2 are the same plant. ! Now my eyesight aint that bad , but surely not, I know from members that the spikey leave one is a thorn apple. Ta to all.
12 Aug, 2010
Answers
Thanks Beattie, owe you a drink, won a fiver out of that one. X
12 Aug, 2010
LOL Don't know when I'll be visiting Kent to collect! :-)
12 Aug, 2010
They are very closely related. Rule of thumb for I.D.: Thorn Apple flowers stand up, at least at an angle, and the pod is round and spiny or bumpy. Angel's Trumpet flowers hang down, and the pod is smooth and cigar-shaped.
13 Aug, 2010
Previous question
The spikey one is Datura (probably D.stramonium) or thorn apple. It's an annual.
The smooth leaved one has been reclassified as Brugmansia - shrubby & woodier, and perennial. There's more info here -
http://www.clisby.eclipse.co.uk/angels-trumpets.htm
12 Aug, 2010