These are interesting specimens because they illustrate how permanent herbarium specimens are. The one on your left was collected by Evan Pugh in 1856 in the neighborhood of Heidelberg. The one on the right was collected by a modern German botanist Ulrich Kuhl in 2012 from the same general location, the same part of Germany. And you'll note that they are identical, although this specimen has had the experience of being collected in Heidelberg in 1856 and then taken across the Atlantic Ocean and then by train somehow or other, it depends on the Aenean, then by horse drawn vehicle to a college from Belphon, which is the closest you could get by a rail at that time. And this shows that if you dry a plant and press it flat, you've reduced it to almost entirely cellulose and nothing will happen to it if you keep it dry and free from insects and anything else that might want to destroy it. If you leave it alone, keep it dry. It remains the same. You'll notice that the paper from this Pugh specimen has darkened a little bit. That's because there was enough ligament in that paper that makes an acid reaction and has slightly darkened the paper instead of being like the one on the right, which is an acid free paper and probably will stay white for a long time. If you look at Evan Pugh's specimen, you can see that all he did was record that it came from Heidelberg and the date he collected it. Nowadays, although this isn't even enough information, you at least have the exact location of the place in Bodden, Verdeberg, Germany, where it came from, that's the German state in which Heidelberg occurs. It tells what kind of an environment it was. It tells that the carolas were yellow. Of course you can see that probably in both of these that the carolas were yellow, but that's not always the case. Sometimes they turn black and dry and you need to know that. It's nice to record information of that. Nowadays, we also are obliged to provide the latitude and longitude of the locality, and not just to say that it's in general terms like this. This man should really now have a GPS that he can give you the exact latitude and longitude. Herbarium is full of specimens that we would like to have more information about, but they didn't use to give much in the 19th century.