Impatiens gomphophylla Baker

Erect perennial, perhaps occasionally annual, to 1.5 m. tall; stems simple or rather poorly branched, sometimes somewhat decumbent, glabrous or sparsely pubescent on the youngest parts.. Leaves spirally arranged, often rather dense; petiole 2–30 mm. long; lamina elliptic to ovate-lanceolate or elliptic-obovate, 3–9.5 cm. long, 1.6–6 cm. broad, the apex acute or shortly acuminate, the base cuneate, glabrous above or with a few hairs along the midrib, finely pubescent beneath, rarely subglabrous; lateral veins 6–10 pairs, the secondary veins forming a rather distinct reticulate pattern beneath; margin serrate-denticulate to crenulate.. Flowers in axillary fascicles of 2–5(–6), rarely solitary, epedunculate or borne on a very reduced peduncle not exceeding 4 mm. in length, the colour variable from pale yellowish green to greenish orange, flowers with a yellowish spur-sepal and orange or reddish petals being the commonest form.. Bracts linear-lanceolate, 1.5–4 mm. long, inconspicuous.. Pedicels 1.8–4.5 cm. long, slender, glabrous or sparsely pubescent, ascending to horizontal in flower, but becoming ± pendent in fruit.. Lateral sepals 2, lanceolate or narrowly triangular, 4–7 mm. long, usually glabrous.. Lower sepal rather narrowly to broadly saccate, 5–8(–9) mm. long, 15–20 mm. deep, ± abruptly constricted into a 5–8 mm. long incurved spur, swollen and often somewhat bilobed at the tip, glabrous, or sparsely pubescent in the distal half.. Dorsal petal 11–14 mm. long, 7–11.5 mm. broad, cucullate, dorsally with a broad crest terminating in a short acute point.. Lateral united petals 6–8 mm. long; upper petal obliquely ovate or ± rhombic, 6–10 mm. long, 4–7.5 mm. broad; lower petal oblong or elliptic, 4.5–9 mm. long, 2.5–6 mm. broad.. Ovary glabrous.. Fruit broadly fusiform, 18–20 mm. long, 6–8 mm. broad.. Fig. 4/60, p. 8.