Table 1. Overlap of collectors across collections.

	University of Vienna	Royal Botanical Garden Edinburgh	Meise Botanic Garden	JACQ collections
Botanic Garden and Botanical Museum Berlin	534 (55,972)	25 (59,062)	417 (356,987)	1,205 (164,369)
JACQ collections	499 (137,571)	22 (60,767)	316 (222,197)	-
Meise Botanic Garden	154 (90,518)	14 (28,550)	-
Royal Botanical Garden Edinburgh	13 (29,789)	-

Number of collectors with specimens in each two collections and (in brackets) number of corresponding specimens. Only digitized specimens were considered. The numbers for the herbarium network JACQ [22] exclude specimens from the Botanic Garden Berlin and the University of Vienna, which have been calculated separately.