alt Hacker NewsFor those interested, you can search through the collections of herbariums all over north America through portals such as the Consortium of Midwest Herbaria[0], in Europe through digHerb [1], and throughout the rest of the world through many other symbiota portals [2].
You can find your nearest brick and mortar herbarium globally through Index Herbariorum[3]. Though these resources are incomplete, they are pretty extensive regardless.
[0]https://midwestherbaria.org/portal/collections/search/index....
[1]https://digiherb.symbiota.org/
Also for those in the States, contact your local state University extension office. They know of local resources like this that aren't widely advertised/don't have an online presence.