Estimated accessioned holdings of the MSC lichen collection by geographic region.
 
Geographic Reagion  Number  Percentage
N. America (inc. Mexico, excl. Michigan)  40 753 37.3 
Michigan 16 770 15.3
Caribbean 15 009  13.7
South America 11 887  10.9
Europe, Africa, Asia  8 548  7.8
Australasia (inc Kerguelen)  6 093  5.6
Exsiccatae  10 290  9.4
TOTAL  109 348 100.0