Data from: Population dynamics and life history of Euphorbia rosescens, a perennial herb endemic to florida scrub

Euphorbia rosescens is a recently described plant that is narrowly endemic to the Lake Wales Ridge. Little is known of the ecology or life history of this diminutive, deeply rooted polygamodioecious perennial. We studied 13 subpopulations of this species from 2004-2012 from five habitats, sampling monthly during its growing season. Subpopulations were stable year-to-year with annual survivals > 90%, but with considerable within-year dynamics, peaking in density in April and dying back in the fall and winter. Stem densities did not vary among subpopulations, habitats, or by subpopulation gender. Annual plant dormancy was common and decreased subsequent survival. Belowground biomass averaged almost 50 times higher than aboveground biomass. Subpopulations either consisted of entirely female individuals or a mixture of male and functionally andromonoecious individuals and these subpopulation genders remained stable across years. Overall, flowering has been dominated by female plants. Plants produced modest numbers of inflorescences (cyathia), and fruit production was very low. Although most plants survived fire by resprouting, fire decreased survival and had a short-term positive effect on floral production. Lack of fecundity and recruitment are concerns for this state-endangered species, but more information is needed on its breeding system and clonality to make specific management recommendations.粉花大戟（Euphorbia rosescens）是近年被正式描述的植物，其分布范围极窄，仅特有于威尔士湖脊（Lake Wales Ridge）。目前对这种小型深根性杂性异株多年生植物的生态学特征与生活史仍知之甚少。我们于2004年至2012年间，针对来自5类生境的该物种13个亚种群开展研究，在其生长季内每月进行采样。各亚种群年度间保持稳定，年存活率高于90%，但年内动态波动显著：种群密度于4月达到峰值，秋季与冬季则出现地上部分枯萎。茎秆密度在亚种群间、生境间以及亚种群性别类型间均无显著差异。多年生植株的年度休眠现象较为普遍，且休眠会降低后续存活率。地下生物量平均几乎达到地上生物量的50倍。亚种群要么完全由雌性个体构成，要么由雄性个体与功能上的雄全同株个体混合组成，且这类亚种群的性别结构在多年间保持稳定。总体而言，开花个体以雌性植株为主。植株仅能产生数量有限的花序（杯状聚伞花序cyathia），且结实率极低。尽管多数植株可通过萌蘖新芽在火灾中存活，但火灾仍会降低植株存活率，同时对开花量产生短期的积极影响。结实与更新不足是这一州级濒危物种面临的生存隐患，但目前仍需更多关于其繁育系统与克隆特性的研究数据，方可制定针对性的管理建议。