Appendix A. Mean peak flowering dates and regression slopes for the 15 most common species with flowering periods overlapping that of Lathyrus.
Mean peak flowering dates (averaged over plots and years) and regression slopes for the 15 most common species with flowering periods overlapping that of Lathyrus. Slopes of linear regressions between snowmelt date and peak flowering date, flowering duration, or flowering intensity are given (as number of days change in flowering period, or change in number of flowers/inflorescences, per day of delay in snowmelt). Significant relationships (P < 0.05) are indicated by asterisks (*). Flowering intensity was 4th–root transformed for significance testing, but slopes are from untransformed data.
Species |
Peak flowering date |
Slope of regression on snowmelt date |
||
Peak |
Duration |
Intensity |
||
Mertensia fusiformis Greene |
7 June |
0.68* |
0.04 |
3.4* |
Mahonia repens (Lindl.) G. Don |
8 June |
0.72* |
–0.14* |
–2.5 |
Androsace septentrionalis L. |
16 June |
0.74* |
0.09 |
–0.4 |
Delphinium nuttallianum Pritz. |
19 June |
0.56* |
0.09 |
7.8* |
Amelanchier alnifolia Nutt. |
20 June |
0.58* |
–0.02 |
1.9 |
Arabis drummondii Gray |
23 June |
0.64* |
–0.23 |
–0.5* |
Draba aurea Vahl |
27 June |
0.58* |
–0.19 |
–0.4 |
Lathyrus lanszwertii Kellogg var. leucanthus (Rydb.) Dorn |
28 June |
0.69* |
0.09 |
2.7* |
Lupinus polyphyllus Lind. var. prunophilus (Jones) Phillips |
6 July |
0.43* |
0.08 |
6.2* |
Erysimum asperum (Nutt.) DC. |
7 July |
0.78* |
0.07 |
0.1 |
Mertensia ciliata (James) G. Don |
9 July |
0.43* |
0.17 |
14.0* |
Linum lewisii Pursh |
17 July |
0.64* |
–0.10 |
–0.3 |
Potentilla hippiana Lehm. × P. gracilis Douglas |
21 July |
0.66* |
0.12 |
1.1 |
Collomia linearis Nutt. |
24 July |
0.22 |
–0.27 |
–0.3 |
Delphinium barbeyi Huth |
24 July |
0.49* |
0.14* |
22.0* |