Table 1.

Type and number of herbarium samples.

type of sample	species	number of samples	collection year (range)	number of infected samplesa
historic	Arabidopsis thaliana	54	1863–1993	—
	Solanum tuberosum	12	1845–1896	12
	Solanum lycopersicum	5	1737–1876	2
	total	71	1737–1993	14
modern	Arabidopsis thaliana	15	2014	—

^aSamples with lesions are compatible with Phytophthora infestans lesions.