Table 1.
Overview on populations sampled and location characteristics of the sites
| Taxon | Country | Population | Location | Elevation [m.a.s.l.] | Latitude | Longitude |
|---|---|---|---|---|---|---|
| GEO | Georgia | A | Banis-Khevi | 980 | 41°53′ | E 043°21′ |
| GEO | Georgia | B | Keda-Akutsa | 500 | 41°35′ | E 041°57′ |
| GEO | Georgia | C | Dandalo | 910 | 41°38′ | E 042°07′ |
| GEO | Georgia | D | Botanical Garden, Batumi | 85 | 41°41′ | E 041°43′ |
| GEO | Georgia | E | Djarnali | 175 | 41°33′ | E 041°36′ |
| GEO | Georgia | F | Mtirala | 960 | 41°39′ | E 041°47′ |
| ESP | Spain | G | Garganta de Puerto Oscuro | 790 | 36°30′ | W 005°37′ |
| ESP | Spain | H | Garganta de Passada Llana | 760 | 36°30′ | W 005°35′ |
| ESP | Spain | I | Arroyo del Montero | 660 | 36°29′ | W 005°35′ |
| ESP | Spain | K | Garganta de Enmedio | 445 | 36°32′ | W 005°38′ |
| ESP | Spain | L | Llanos del Juncal | 740 | 36°06′ | W 005°32′ |
| ESP | Spain | M | Rio de la Miel | 430 | 36°06′ | W 005°31′ |
| IRE | Ireland | N | National Park Killarney, Torc Mnts. | 60 | 52°00′ | W 009°30′ |
| IRE | Ireland | O | National Park Killarney, Ladies View | 35 | 51°58′ | W 009°35′ |
| IRE | Ireland | P | Glengariff | 35 | 51°45′ | W 009°33′ |
| IRE | Ireland | Q | Galtee Mnts. | 180 | 52°22′ | W 007°58′ |
| IRE | Ireland | R | Knockmealdown Mnts. | 220 | 52°15′ | W 007°57′ |
| IRE | Ireland | S | Greenan, Wicklow Mnts. | 120 | 52°55′ | W 006°18′ |
| MAM | USA | A | Two Chimneys, Great Smokey Mnts. National Park | 1075 | 35°38′ | W 083°28′ |
| MAM | USA | B | The Sinks, Great Smokey Mnts. National Park | 545 | 35°40′ | W 083°39′ |
| MAM | USA | C | Mingus Mill, Great Smokey Mnts. National Park | 605 | 35°30′ | W 083°19′ |
| MAM | USA | D | Saunakee Village Viewpoint, Blue Ridge Parkway National Park | 1365 | 35°25′ | W 083°02′ |
| MAM | USA | E | Linville Falls, Blue Ridge Parkway National Park | 1035 | 35°56′ | W 081°55′ |
| MAM | USA | F | Green Know, Blue Ridge Parkway National Park | 1390 | 35°42′ | W 082°14′ |
| CAM | USA | A | Two Chimneys, Great Smokey Mnts. National Park | 1120 | 35°38′ | W 083°28′ |
| CAM | USA | B | Mt. Sterling, Great Smokey Mnts. National Park | 1721 | 35°42′ | W 083°06′ |
| CAM | USA | C | Waterrock Knob, Blue Ridge Parkway National Park | 1815 | 35°27′ | W 083°08′ |
| CAM | USA | D | Richland Balsam Summit, Blue Ridge Parkway National Park | 1846 | 35°21′ | W 082°59′ |
| CAM | USA | E | Craggy Gardens, Blue Ridge Parkway National Park | 1725 | 35°41′ | W 082°22′ |
| CAM | USA | F | Grandfather Mountain, Blue Ridge Parkway | 1615 | 36°05′ | W 081°49′ |
GEO = Rhododendron ponticum, Georgia; ESP = R. ponticum, Spain; IRE = R. ponticum, Ireland; MAM = R. maximum, North America; CAM = R. catawbiense, North America.