Ongoing changes in temperature and precipitation regime may have a strong impact on vulnerable life-history stages such as germination, especially in alpine regions. Differences in germination patterns among species and populations may reflect their adaptation to conditions of their origin or may be determined by the phylogenetic constraints. These two effects are, however, rarely separated. All the germination patterns may also be modified by seed mass. We studied 40 populations of 14 species of Impatiens coming from different elevations in the Himalayas. Three home site temperatures were simulated and one warmer temperature according to a climate change scenario were used. We also studied the combined effect of shorter stratification and warmer temperature as another possible effect of climate change. Interactions of home site and germination conditions affected total germination and germination speed, but not seed dormancy. Seed mass and home site conditions’ interaction indicated different germination strategies in light and heavy seeds. Only seed mass was affected by phylogenetic relationships among the species, while germination response (except T30) was driven primarily by home site conditions. This study is the first to show that the effect of seed mass interacts with home site conditions in determining species’ germination patterns under changing climate. The differences in seed mass are thus likely crucial for species’ ability to adapt to novel conditions since seed mass, unlike seed germination patterns, is strongly phylogenetically constrained. Further studies exploring how seed mass modifies species’ germination under changing climate are needed to confirm generalisability of these findings.

温度和降水状态的持续变化可能会对脆弱的生活史阶段（如发芽）产生强烈影响，尤其是在高山地区。物种和种群之间发芽模式的差异可能反映了它们对起源条件的适应性，也可能由系统发育限制所决定。但是，这两种效果很少分开。所有的发芽模式也可以通过种子质量进行修饰。我们研究了14种凤仙花的40个种群来自喜马拉雅山脉的不同海拔。模拟了三个现场温度，并根据气候变化情景使用了一个较暖的温度。我们还研究了更短的分层和更暖的温度的共同影响，这是气候变化的另一种可能的影响。家园和发芽条件的相互作用影响总发芽和发芽速度，但不影响种子休眠。种子质量和原位条件的相互作用表明，轻种子和重种子的萌发策略不同。物种之间的系统发育关系仅影响种子质量，而发芽反应（T30除外）主要受原地条件驱动。这项研究首次表明，在确定气候变化下物种的萌发模式时，种子质量与居家条件相互作用。因此，种子质量的差异可能对物种适应新条件的能力至关重要，因为与种子萌发模式不同，种子质量在系统发育上受到严格限制。需要进一步研究探索种子质量如何在变化的气候下改变物种的发芽，以确认这些发现的一般性。