Table 1.
Comparison among Impatiens pandurata, I. apalophylla, I. clavigera and I. spathulata
| Characters | I. pandurata | I. apalophylla | I. clavigera | I. spathulata |
|---|---|---|---|---|
| Plant | Glabrous | Glabrous | Glabrous | Puberulous |
| Shape of leaf | Oblanceolate | Ovate to oblanceolate | Obovate to oblanceolate | Obovate |
| Size of leaf | 5–7 cm × 1–1.5 mm | 10–22 cm × 4–8 cm | 5–15 cm × 3–5 cm | 6–11 cm × 2.5–3.5 cm |
| Inflorescence | 3–5-flowered | 4–10-flowered | 5–9-flowered | 2–4-flowered |
| Floral color | Yellow | Yellow with reddish patches | Yellow | Pink |
| Outer lateral sepals | Oblique, ovate-orbiculate, aequilateral, apex acuminate | Oblique ovate, apex acuminate | Oblique ovate, apex acuminate | Oblique ovate to ovate, apex acuminate |
| Inner lateral sepals | Linear | Lanceolate | Linear-lanceolate | Linear-lanceolate |
| Lower sepal | Absent patch | With redish patches | Absent patch | Absent patch |
| Spur | Long, 1–1.5 cm | Long, 1.5–2 cm | Short, 5–6 mm | Long, 1.5–1.8 cm |
| Lower lobe of united petals | 8–12 mm long, elliptic | 1–1.5 cm long, oblong | 1–1.2 cm long, oblong | 1–1.2 cm long, oblong |
| Upper lobe of united petal | 2–2.5 cm long, oblong, yellow, with slightly reddish patches | 2.5–2.7 cm long, oblong, yellow, with apparent reddish patches | 2.5–2.6 cm long, oblong, yellowish-green, absent patch | 2.3–2.5 cm long, oblong, pink, absent patch |
| Dorsal petal | Suborbicular | Elliptic | Obovate | Elliptic to ovate |