Impatiens oreocallis Launert

Rather weak annual herb; stems simple or moderately branched, up to 50 cm. in length, usually less, ± erect to decumbent, sometimes rooting at the lower nodes, glabrous or thinly pilose on the youngest shoots.. Leaves spirally arranged, or the upper sometimes in whorls of 3–4, sessile or with the lamina tapering gradually into a short 1–5(–8) mm. long petiole; lamina ovate-lanceolate, elliptic or oblanceolate, more rarely ± rhombic, (1.5–)1.8–9(–11) cm. long, 0.7–3(–4) cm. broad, apex acute, often shortly acuminate, the base attenuate, rarely cuneate, glabrous to sparsely pubescent above and below; lateral veins (3–)4–5 pairs; margin serrate with several 1–3 mm. long fimbriae towards the base.. Flowers solitary or in fascicles of 2–3, pink or purplish.. Bracts subulate, ± 2 mm. long, inconspicuous.. Pedicels 1.2–4(–5) cm. long, sparsely pilose or glabrous, slender.. Lateral sepals lanceolate-triangular, 2.2–5(–7) mm. long, acute, pilose along the margin. Lower sepal shallowly and obliquely navicular. 4.5–7 mm. long, abruptly constricted into a 1.6–3.5 cm. long curved filiform spur, slightly thickened at the tip, thinly pilose along the lower edge of the sepal and sometimes along the lower half of the spur.. Dorsal petal 5–9(–10) mm. long, 7–12 mm. broad (when flattened), dorsally narrowly crested, the crest terminating in a subacute point, glabrous or thinly pilose along the crest. Lateral united petals 8–18(–20) mm. long, the petals of each pair slightly overlapping or with a narrow sinus between them; upper petal obcordate, 6–15 mm. long, 4.5–14 mm. broad, the upper margin retuse or emarginate; lower petal oblong to oblong-obovate or elliptic, 8–16 mm. long, 5–8 mm. broad, obtuse.. Ovary glabrous, or pilose in the central region.. Fruit broadly-fusiform, ±12 mm. long, 5 mm. broad, with a short beak, glabrous or thinly pilose.. Fig. 2/25, p. 4.