Why are tundra flowers often colourful and large compared with the plants that produce them?

In the tundra ecosystem, plants have evolved to produce flowers that are relatively large and colourful compared to the size of the plant itself. This adaptation is primarily driven by the need to complete their life cycles rapidly during the brief growing season, which typically lasts only two to four months.1

The large, colourful blossoms serve as an important strategy for attracting pollinators in an environment where time is limited. Furthermore, these flowers are not merely decorative; they are functional in managing temperature. In direct sunlight, these flowers can become 2–10 °C (4–18 °F) warmer than the surrounding air, which aids in the development of the plant and its seeds. Some species also feature hairy flower stalks that help retain warm air, further raising the temperature near the plant by 3–9 °C (5–15 °F), a critical adaptation for survival and reproduction in near-freezing conditions.1