Table 1 Sampling localities of studied taxa

LOC_1

Völs/Seis am Schlern (NE from Bozen)

Pop088

P. argentea

ITA; SW of Seis am Schlern

Pop085

P. pusilla

ITA; Völs am Schlern, 0.5 km N

Pop089

P. incana

ITA; Völs am Schlern, Mongadui

Pop086

P. alpicola

ITA; Völs am Schlern, St. Konstantin

Pop087

P. alpicola/pusilla

ITA; Völs am Schlern, St. Konstantin

LOC_2

Burgstall/Lana-Burgstall (SE from Meran)

Pop093

P. argentea

ITA; Burgstall, western slope

Pop094

P. pusilla

ITA; Burgstall, western slope

Pop095

P. collina

ITA; Burgstall/Lana, railway station

LOC_3

Glurns (Vinschgau)

Pop098

P. argentea

ITA; Glurns, sedimentation tank

Pop099

P. pusilla

ITA; Glurns, settlement Sölles

Pop097

P. collina

ITA; Glurns, sedimentation tank

LOC_4

Schluderns (Vinschgau)

Pop100

P. argentea

ITA; Schluderns, Kalvarienberg

Pop101

P. pusilla

ITA; Schluderns, Kalvarienberg

Pop102

P. alpicola

ITA; Schluderns, Kalvarienberg

LOC_5

Laatsch/Münstertal valley

Pop198

P. argentea

ITA; exit of the Münstertal valley/Laatsch

Pop199

P. pusilla

ITA; exit of the Münstertal valley/Laatsch

Pop200

P. alpicola

ITA; exit of the Münstertal valley/Laatsch

LOC_6

Kauns (Northern Tyrol)

Pop206

P. argentea

AUT; Ötztaleralpen, Kauns, W of the church

Pop205

P. pusilla

AUT; Ötztaleralpen, Kauns, ESE of the church

Pop204

P. collina

AUT; Ötztaleralpen, Kauns, ESE of the church

EXTRA LOCALITIES

Pop202

P. argentea

CHE; Münstertal valley, NW Müstair

Pop074

P. aurea

AUT; Northern Limestone Alps

Pop075

P. brauneana

AUT; Northern Limestone Alps

Pop080

P. crantzii

AUT; Obergurgl, Rotmoostal valley

Pop096

P. frigida

AUT; Ötztaleralpen, summit Fineiljoch

Pop103

P. frigida

ITA; Southern Tyrol, Stilfserjoch pass

Pop201

P. pusilla

CHE; Münstertal valley, NW Müstair

Pop190

P. pusilla × thuringiaca

CHE; Engadin, Ftan, above the railway station

Pop189

P. thuringiaca

CHE; Engadin, Ftan, above the railway station

Pop203

P. aff. verna

CHE; Münstertal valley, NW Müstair