Ragweed does not have thorns.
Thorns are a defensive adaptation of plants against being eaten by grazing animals.
The Wild Pear Tree and the Common pear has wicked thorns .
Ragweed antigens bind to mast cells, which release histamines.
The book Ragweed by Avi has 224 pages.
It is called The Crown of Thorns.
A bramble.
Well, depending on the kind of lemon tree. Most do have thorns, but the thorns usually decrease as the tree gets older.
http://en.wikipedia.org/wiki/Ragweed here is a link
NO! Ragweed is poisonous to horses and can kill them if it is ingested.
Apparently the wild pear tree or common pear has wicked thorns at the end of new branch shoots.
yellow
Cross Canadian Ragweed - album - was created on 2002-09-10.