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Table 1 Comparison among Impatiens pandurata, I. apalophylla, I. clavigera and I. spathulata

From: Impatiens pandurata (Balsaminaceae), a new species from Yunnan, China

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