Table 1 Collection details of accessions of Saxifraga hirculus used in the study (Ni=no. individuals sampled)

Scotland

Grampians, Silverford

57°19′N, 2°57′W

SF

2

Grampians, Buck of Cabrach

57°19′N, 2°59′W

BC

2

Grampians, Slug Burn

57°19′N, 2°58′W

SB

2

Pentlands, Craigengar, The Pike

55°46′N, 3°29′W

CNG

1

England

Pennines, Sally Grain Head

54°45′N, 2°19′W

SGH

3

Pennines, Yad Moss

54°44′N, 2°21′W

YM

3

Pennines, Great Shunner Fell

54°22′N, 2°14′W

GSF

2

Pennines, Knock Ore Gill

54°25′N, 3°26′W

KOG

2

Northern Ireland

Garron Plateau, Antrim

54°45′N, 6°0′W

NI

3

Svalbard

Spitsbergen, Nordenskiold Land

78°N, 15°E

SH

4,5

Denmark

Jutland, Rosborg Sø

56°25′N, 9°13′E

DEN

3,6

Switzerland

Vaudoise, Col du Marchairuz

43°33′N, 6°14′E

SWZ

6

Iceland

Reykjavik

64°08′N, 21°46′W

ISW

3

Holtavörduheidi Pass

64°59′N, 21°04′W

INW

3

Nr Vatnshlid

65°31′N, 19°44′W

IN

3

Lambafellsheidi

63°34′N, 19°39′W

IS1

3

Ashólfsskáli

63°35′N, 19°49′W

IS2

3,7

Alaska

N. of Anchorage, Summit Lake

61°27′N, 149°27′W

SUM

8

Denali Natl. Park, Primrose Ridge

63°45′N, 149°22′W

PRM

22,23

Denali Natl. Park, Sable Pass

63°33′N, 149°36′W

SAB

9–15

Denali Natl. Park, Polychrome Pass

63°31′N, 149°50′W

PCH

13,15–17

Denali Natl. Park, Highway Pass

63°28′N, 150°10′W

HWY

13,15,18–21

Richardson Hwy, Fielding Lake

63°6′N, 145°24′W

FLD

13,15–17,24–26

Nome, Kougarok Road

64°30′N, 165°8′W

KOU

13,22,27

Nome/Teller Rd, Penny River

64°36′N, 165°40′W

PEN

13,22,28–30

Nome/Teller Rd, Kigluaik Mtns.

64°48′N, 165°48′W

KIG

13,22,30,31

Nome/Teller Rd, Mile 56

64°54′N, 166°0′W

M56

13,17,38

Nome/Teller Rd, Mile 62

65°0′N, 166°12′W

M62

17

Teller, S of Teller

65°18′N, 166°24′W

TEL

17,22,32–37

Colorado

Summit Lake, Mt. Evans

39°35′N, 105°39′W

CSL

39

2.8 mile E of North Tarryall Peak

39°19′N, 105°35′W

CRI

40