Osmanthus fragrans, a popular plant in China, was studied to understand how it photosynthesizes in different seasons. Researchers measured its photosynthesis rate in winter and summer, along with factors like temperature and light. They found that photosynthesis increased with temperature and stomatal conductance, reaching a peak before slightly decreasing. Photosynthesis was less efficient in winter compared to summer. The plant adapted by adjusting its photosynthesis and transpiration to avoid damage from high temperatures and light in summer. Overall, the plant's ability to take in carbon dioxide was similar in both seasons, but water use efficiency was lower in summer.