Figure 3. Warming-induced changes in (A) first flower, (B) last flower and (C) flower duration for each species. Asterisks indicate significant differences at P < 0.05 (*), P< 0.01 (**) and P < 0.001 (***). Values are mean ± standard errors. Sk: Stipa krylovii . Pc: Poa crymophila . Kc: Koeleria cristata . Mr: Medicago ruthenica . Kh: Kobresia humilis . As: Artemisia scoparia . Ha: Heteropappus altaicus . Gs: Gentiana squarrosa .