Type: shrub
Height: 1–8 m
Leaves: Compound, opposite, 10–25 cm long, with 3–6 pairs of leaflets
Leaflets: Elliptic-lanceolate, 2–10 × 1–4 cm, apex long-acuminate, cuneate base, finely toothed margin, glabrous surfaces
Petiole: 3–5 cm
Inflorescences: Terminal, erect or inclined
Flowers: Bright yellow, tubular (trumpet-shaped), tube 3–5 cm with red lines, 5 rounded lobes 1–1.5 cm
Fruits: Linear, flattened capsules, 10–20 × 0.5–1 cm, brown at maturity