Impatiens assurgens Baker

Annual or perennial 10–60(–80) cm. tall, with simple erect or few-branched stems arising from a crown subtended by a number of fleshy thong-like roots; stems glabrous or pubescent on the younger parts; rootstock with fleshy thong and fibrous roots.. Leaves opposite, rarely ternate, often crowded toward the tops of the stems, sessile or subsessile, the petiole, when present, not exceeding 4–5 mm. in length; lamina oblong, ovate, lanceolate to elliptic or suborbicular, 1.5–6.5(–9) cm. long, (0.2–)0.4–2.2(–2.5) cm. broad, the lower ones often broader and shorter than the upper, usually chartaceous, the base rounded, sometimes subcordate, the apex acute to subobtuse, sometimes ± acuminate, glabrous or pubescent to sometimes almost lanate on both surfaces; margin shallowly serrulate-denticulate to serrate; lateral veins 5–9 pairs, obscure.. Flowers solitary or in axillary fascicles of 2–3, epedunculate, white, pale pink or mauve, often with an orange-yellow spot on each lateral united petal towards the base, spur often reddish towards the tip.. Bracts lanceolate-triangular to subulate, 1–2 mm. long, inconspicuous.. Pedicels 3.3–6.5 cm. long, glabrous or pubescent.. Lateral sepals ovate-lanceolate, 3–6 mm. long, 1–2 mm. broad, acute, glabrous.. Lower sepal obliquely navicular, 10–12 mm. long, 5–8 mm. deep, ± abruptly constricted into a 3–10 mm. long straight or slightly curved spur, usually tapered to a fine tip, glabrous.. Dorsal petal 8–12 mm. long, 5–8 mm. broad (not flattened), cucullate, dorsally with a narrow crest terminating in a short point, usually glabrous, but sometimes slightly pubescent on the crest.. Lateral united petals 15–28 mm. long; upper petal oblong, obovate or oval, 7–9 mm. long, 5–7 mm. broad, entire, about one-third to a half the size of the lower; lower petal transversely and obliquely elliptic, 9–15 mm. long, 6–11 mm. broad, distally with a slight emargination along the inner margin.. Ovary glabrous.. Fruit fusiform, 9–15 mm. long, 3–5.5 mm. broad, glabrous.