Cinchona mutisii

Cinchona mutisii is a tree that grows up to 6 metres (20 ft) tall and 15 centimetres (5.9 in) wide. The leaves are papery when dry, 2.8–7 centimetres (1.1–2.8 in) long, 1.4–3.4 centimetres (0.55–1.34 in) wide, and ovate to oblong in shape. The leaf stems are 0.5–1.3 centimetres (0.20–0.51 in) long. The calyx is 2.8–4.6 millimetres (0.11–0.18 in) long, and has 0.9–1.8 millimetres (0.035–0.071 in) long lobes. The corolla is tube-shaped, 8.9–12 millimetres (0.35–0.47 in) long, green to yellow on the outside, and dark purplish on the inside. The corolla has 3.5–6.4 millimetres (0.14–0.25 in) long lobes. The fruit is a dehiscent, ellipsoid capsule, measuring 11–21 millimetres (0.43–0.83 in) long, and 7–10 millimetres (0.28–0.39 in) wide. The seeds are 6.2–7.1 millimetres (0.24–0.28 in) long, and 3.1–3.5 millimetres (0.12–0.14 in) wide.

Cinchona mutisii is native to the wet tropical biome of southern Ecuador. It grows at elevations of 2,000–3,500 metres (6,600–11,500 ft).