Table 1.
Geographic distribution and climatic parameters of Echinacea angustifolia populations and the outgroup E. sanguinea
| Collection site |
||||||||
|---|---|---|---|---|---|---|---|---|
| Population no. |
Population code |
Plant no. |
Latitude |
Longitude |
FFD |
AMP (mm) |
AMT (°C) |
|
| 1 | ND-007 | 1, 2, 3 | 47°34′51″N | 103°26′12″W | 118 | 404 | 5·3 | |
| 2 | ND-004 | 4, 5, 6 | 46°56′40″N | 103°33′54″W | 122 | 399 | 5·6 | |
| 3 | SD-002 | 7, 8, 9 | 43°54′10″N | 102°26′12″W | 144 | 427 | 8·3 | |
| 4 | NE-001 | 10, 11, 12 | 42°46′58″N | 100°02′05″W | 138 | 538 | 8·7 | |
| 5 | NE-002 | 13, 14, 15 | 41°40′37″N | 99°21′56″W | 131 | 589 | 9·3 | |
| 6 | NE-003 | 16, 17, 18 | 41°09′18″N | 96°53′22″W | 163 | 714 | 10·2 | |
| 7 | KS-CD | 19, 20, 21 | 39°21′55″N | 97°41′15″W | 178 | 676 | 11·8 | |
| 8 | KS-HO | 22, 23, 24 | 38°15′15″N | 99°41′28″W | 173 | 551 | 12·9 | |
| 9 | OK-WD | 28, 29, 30 | 36°57′27″N | 99°04′59″W | 191 | 747 | 14·8 | |
| 10 | OK-CO | 25, 26, 27 | 34°36′32″N | 98°35′49″W | 209 | 721 | 16·2 | |
| 11 | E. sanguinea* | 31, 32, 33 | 30°58′00″N | 93°13′00″W | 251 | 1461 | 19·4 | |
All data are for the period 1931–2000 for climatic divisions from which the collection sites were located. See text for additional details.
FFD, freeze-free days; AMP, annual mean precipitation; AMT, annual mean temperature.
*
USDA accession Ames 23874.